UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





FORM 10-K







|x | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ------------------------------------------------------------------------------------

For the fiscal year ended December 31, 2012

or



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from
 to

Commission file number





333-166711-02

(Commission File Number of issuing entity)

Citigroup Commercial
Mortgage Trust 2012-GC8

(Exact name of issuing entity as specified in its charter)

333-166711

(Commission File Number of depositor)

Citigroup Commercial Mortgage Securities Inc.

(Exact name of depositor
as specified in its charter)

Citigroup Global Markets Realty Corp.

Goldman Sachs Mortgage Company

Natixis Real Estate Capital LLC

(Exact name of sponsor as specified in
its charter)







|                                                                    |  |                                     
|------------------------------------------------------------------- |  | ------------------------------------
|New York                                                            |  | 90-6223187 90-6223322 60-6223352    
|(State or other jurisdiction of
organization of the issuing entity) |  | (I.R.S. Employer Identification No.)

c/o Citibank, N.A.

388 Greenwich Street, 14thFloor

New York, New York 10013

(Address of principal executive offices of
issuing entity)

(212) 816-5614

Registrants telephone number, including area code

Securities
registered pursuant to Section 12(b) of the Act: None

Securities registered pursuant to section 12(g) of the Act:
None





Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.     ̈  Yes    x  No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the
Act.     ̈  Yes    x  No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for
such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90
days.    x  Yes     ̈  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule
405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Not Applicable

Indicate by
check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrants knowledge, in definitive proxy or
information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.

Not
Applicable

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a
smaller reporting company. See the definitions of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act.



|                        |  |                                                  |  |                           |  |  
|----------------------- |  | ------------------------------------------------ |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈                                                |  | Accelerated filer         |  |  ̈
|                        |  |                                                  | 
|Non-accelerated filer   |  | x  (Do not check if a smaller reporting company) |  | Smaller reporting company |  |  ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the
Act).     ̈  Yes    x  No

State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked
price of such common equity, as of the last business day of the registrants most recently completed second fiscal quarter.

Not Applicable

Indicate by
check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.

Not Applicable

Indicate the number of shares outstanding of each of the registrants classes of common stock, as of the latest practicable date.

Not Applicable









---

DOCUMENTS INCORPORATED BY REFERENCE

List hereunder the following documents if incorporated by reference and the Part of the Form 10-K (e.g., Part I, Part II, etc.) into which the document
is incorporated: (1) Any annual report to security holders; (2) Any proxy or information statement; and (3) Any prospectus filed pursuant to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents should be
clearly described for identification purposes (e.g., annual report to security holders for fiscal year ended December 24, 1980).

See Item 15.

PART I

Item 1. Business.

Omitted.

Item 1A. Risk Factors.

Omitted.

Item 1B. Unresolved Staff
Comments.

None.

Item 2. Properties.

Omitted.

Item 3. Legal Proceedings.

Omitted.

Item 4. Mine Safety Disclosures.

Omitted.

PART II

Item 5. Market for Registrants Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Omitted.

Item 6. Selected Financial Data.

Omitted.

Item 7.
Managements Discussion and Analysis of Financial Condition and Results of Operations.

Omitted.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Omitted.

Item 8. Financial Statements and Supplementary Data.

Omitted.

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

Omitted.

Item 9A.
Controls and Procedures.

Omitted.

Item 9B. Other Information.

None.



---

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Omitted.

Item 11. Executive Compensation.

Omitted.

Item 12. Security Ownership of Certain Beneficial Owners and Management and
Related Stockholder Matters.

Omitted.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

Omitted.

Item 14. Principal Accounting
Fees and Services.

Omitted.

ADDITIONAL DISCLOSURE ITEMS REQUIRED BY GENERAL INSTRUCTION J(2)

Item 1112(b) of
Regulation AB

The property securing the Miami Center mortgage loan constitutes a significant obligor within the meaning of
Item 1101(k)(2) of Regulation AB and as disclosed in the Prospectus Supplement for Citigroup Commercial Mortgage Trust 2012-GC8 filed on September 24, 2012. With respect to the property securing the Miami Center mortgage loan, the
information required for this Item 1112(b) rests with a person or entity which is not affiliated with the registrant. Oral and written requests have been made on behalf of the registrant, to the extent required under the related pooling and
servicing agreement, to obtain the information required for this Item 1112(b), and the registrant has been unable to obtain such information to include on this Form 10-K by the related filing deadline. The information is therefore being omitted
herefrom in reliance on Rule 12b-21 under the Securities Exchange Act of 1934, as amended.

Item 1114(b)(2) and Item 1115(b) of
Regulation AB

No entity or group of affiliated entities provides any external credit enhancement, uses any derivative instruments or other
support for the certificates within this transaction.

Item 1117 of Regulation AB

The registrant knows of no pending legal proceedings involving the issuing entity and all parties related to the issuing entity or any other entities
contemplated by Item 1117 of Regulation AB that would be material to Certificateholders, other than routine litigation incidental to the duties of those respective parties.

Item 1119 of Regulation AB

Provided previously in the prospectus supplement of the
Registrant relating to the issuing entity and filed pursuant to Rule 424 of the Securities Act of 1933, as amended.

Item 1122 of
Regulation AB

The reports on assessment of compliance with servicing criteria for asset-backed securities and related attestation reports
are attached hereto under Item 15.

Item 1123 of Regulation AB

The servicer compliance statements are attached hereto under Item 15.



---

PART IV

Item 15. Exhibits, Financial Statement Schedules.



|(a) | List the following documents filed as a part of the report:
|--- | -----------------------------------------------------------



| | (1) | Not Applicable
| | --- | --------------



| | (2) | Not Applicable
| | --- | --------------



| | (3) | Exhibits listed below are either included or incorporated by reference as indicated below:
| | --- | ------------------------------------------------------------------------------------------



|              |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|------------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|              | 
|4             |  | Pooling and Servicing Agreement, dated as of September 1, 2012, by and among Citigroup Commercial Mortgage Securities, Inc., as depositor, Wells Fargo Bank, National
Association, as master servicer, Midland Loan Services, a Division of PNC Bank, National Association, as special servicer, Situs Holdings, LLC, as operating advisor, Citibank, N.A., as certificate administrator, and U.S. Bank National Association,
as trustee (filed as Exhibit 4 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012, and is incorporated by reference herein).
|              | 
|10.1          |  | Mortgage Loan Purchase Agreement, dated as of September 1, 2012, between Citigroup Global Markets Realty Corp. and Citigroup Commercial Mortgage Securities, Inc., pursuant to
which Citigroup Global Markets Realty Corp. sold certain mortgage loans to the depositor (filed as Exhibit 10.1 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012,
and is incorporated by reference herein).                                                                                                                                                              
|              | 
|10.2          |  | Mortgage Loan Purchase Agreement, dated as of September 1, 2012, between Goldman Sachs Mortgage Company and Citigroup Commercial Mortgage Securities, Inc., pursuant to which
Goldman Sachs Mortgage Company sold certain mortgage loans to the depositor (filed as Exhibit 10.2 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012, and is
incorporated by reference herein).                                                                                                                                                                            
|              | 
|10.3          |  | Mortgage Loan Purchase Agreement, dated as of September 1, 2012, between Natixis Real Estate Capital LLC and Citigroup Commercial Mortgage Securities, Inc., pursuant to which
Natixis Real Estate Capital LLC sold certain mortgage loans to the depositor (filed as Exhibit 10.3 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012, and is
incorporated by reference herein).                                                                                                                                                                          
|              | 
|31            |  | Rule 15(d)-14(d) Certification                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|              | 
|33.1          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as master servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|              | 
|33.2          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Midland Loan Services, a Division of PNC Bank, National Association, as special
servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|              | 
|33.3          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Situs Holdings, LLC, as operating advisor                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|              | 
|33.4          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Citibank, N.A., as certificate administrator                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|              | 
|33.5          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, U.S. Bank National Association, as custodian                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|              | 
|33.6          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, CoreLogic Commercial Real Estate Services, Inc., as servicing function
participant                                                                                                                                                                                                                                                                                                                                                                                                                                                       



---

|     |  |                                                                                                                                                                                          
|---- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     | 
|33.7 |  | Report on assessment of compliance with servicing criteria for asset-backed securities, National Tax Search, LLC, as servicing function participant                                      
|     | 
|33.8 |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Northmarq Capital, LLC, as servicing function participant                                        
|     | 
|34.1 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Wells Fargo Bank, National Association, as master servicer                              
|     | 
|34.2 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Midland Loan Services, a Division of PNC Bank, National Association, as special
servicer
|     | 
|34.3 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Situs Holdings, LLC, as operating advisor                                               
|     | 
|34.4 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Citibank, N.A., as certificate administrator                                            
|     | 
|34.5 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, U.S. Bank National Association, as custodian                                            
|     | 
|34.6 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, CoreLogic Commercial Real Estate Services, Inc., as servicing function
participant      
|     | 
|34.7 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, National Tax Search, LLC, as servicing function participant                             
|     | 
|34.8 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Northmarq Capital, LLC, as servicing function participant                               
|     | 
|35.1 |  | Servicer compliance statement, Wells Fargo Bank, National Association, as master servicer                                                                                                
|     | 
|35.2 |  | Servicer compliance statement, Midland Loan Services, a Division of PNC Bank, National Association, as special servicer                                                                  
|     | 
|35.3 |  | Servicer compliance statement, Citibank, N.A., as certificate administrator                                                                                                              



|(b) | The exhibits required to be filed by Registrant pursuant to Item 601 of Regulation S-K are listed above and in the Exhibit Index that immediately follows the
signature page hereof.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(c) | Not Applicable
|--- | --------------



---

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

Date: March 29, 2013



|                                             
|---------------------------------------------
|Citigroup Commercial Mortgage Securities Inc.
|(Depositor)                                  
|                                             
|/s/ Paul Vanderslice                         
|Paul Vanderslice, Vice President             
|                                             



---

EXHIBIT INDEX



|              |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|------------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|              | 
|4             |  | Pooling and Servicing Agreement, dated as of September 1, 2012, by and among Citigroup Commercial Mortgage Securities, Inc., as depositor, Wells Fargo Bank, National
Association, as master servicer, Midland Loan Services, a Division of PNC Bank, National Association, as special servicer, Situs Holdings, LLC, as operating advisor, Citibank, N.A., as certificate administrator, and U.S. Bank National Association,
as trustee (filed as Exhibit 4 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012, and is incorporated by reference herein).
|              | 
|10.1          |  | Mortgage Loan Purchase Agreement, dated as of September 1, 2012, between Citigroup Global Markets Realty Corp. and Citigroup Commercial Mortgage Securities, Inc., pursuant to
which Citigroup Global Markets Realty Corp. sold certain mortgage loans to the depositor (filed as Exhibit 10.1 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012,
and is incorporated by reference herein).                                                                                                                                                              
|              | 
|10.2          |  | Mortgage Loan Purchase Agreement, dated as of September 1, 2012, between Goldman Sachs Mortgage Company and Citigroup Commercial Mortgage Securities, Inc., pursuant to which
Goldman Sachs Mortgage Company sold certain mortgage loans to the depositor (filed as Exhibit 10.2 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012, and is
incorporated by reference herein).                                                                                                                                                                            
|              | 
|10.3          |  | Mortgage Loan Purchase Agreement, dated as of September 1, 2012, between Natixis Real Estate Capital LLC and Citigroup Commercial Mortgage Securities, Inc., pursuant to which
Natixis Real Estate Capital LLC sold certain mortgage loans to the depositor (filed as Exhibit 10.3 to the registrants Current Report on Form 8-K/A dated September 24, 2012, and filed by the registrant on October 1, 2012, and is
incorporated by reference herein).                                                                                                                                                                          
|              | 
|31            |  | Rule 15(d)-14(d) Certification                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|              | 
|33.1          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Wells Fargo Bank, National Association, as master servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|              | 
|33.2          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Midland Loan Services, a Division of PNC Bank, National Association, as special
servicer                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|              | 
|33.3          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Situs Holdings, LLC, as operating advisor                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|              | 
|33.4          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Citibank, N.A., as certificate administrator                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|              | 
|33.5          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, U.S. Bank National Association, as custodian                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|              | 
|33.6          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, CoreLogic Commercial Real Estate Services, Inc., as servicing function
participant                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|              | 
|33.7          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, National Tax Search, LLC, as servicing function participant                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|              | 
|33.8          |  | Report on assessment of compliance with servicing criteria for asset-backed securities, Northmarq Capital, LLC, as servicing function
participant                                                                                                                                                                                                                                                                                                                                                                                                                                                                                



---

|     |  |                                                                                                                                                                                          
|---- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|     | 
|34.1 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Wells Fargo Bank, National Association, as master servicer                              
|     | 
|34.2 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Midland Loan Services, a Division of PNC Bank, National Association, as special
servicer
|     | 
|34.3 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Situs Holdings, LLC, as operating advisor                                               
|     | 
|34.4 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Citibank, N.A., as certificate administrator                                            
|     | 
|34.5 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, U.S. Bank National Association, as custodian                                            
|     | 
|34.6 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, CoreLogic Commercial Real Estate Services, Inc., as servicing function
participant      
|     | 
|34.7 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, National Tax Search, LLC, as servicing function participant                             
|     | 
|34.8 |  | Attestation report on assessment of compliance with servicing criteria for asset-backed issuers, Northmarq Capital, LLC, as servicing function participant                               
|     | 
|35.1 |  | Servicer compliance statement, Wells Fargo Bank, National Association, as master servicer                                                                                                
|     | 
|35.2 |  | Servicer compliance statement, Midland Loan Services, a Division of PNC Bank, National Association, as special servicer                                                                  
|     | 
|35.3 |  | Servicer compliance statement, Citibank, N.A., as certificate administrator