UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549

                                    FORM 10-K

                   Annual Report Pursuant to Section 13 or 15(d)
                      of the Securities Exchange Act of 1934

                             For the fiscal year ended
                                 December 31, 2006

           Commission file number of issuing entity: 333-127620-23

                              FFMLT Trust 2006-FF4
          (Exact name of issuing entity as specified in its Charter)

                          GS Mortgage Securities Corp.
          (Exact name of depositor as specified in its Charter)

                        Goldman Sachs Mortgage Company
            (Exact name of sponsor as specified in its Charter)

                                             Pooling Tier REMIC 1 32-0172782
                                              Pooling Tier REMIC 2 35-2269882
                                                  Lower-Tier REMIC 36-4587496
                                                  Upper-Tier REMIC 37-1522676
                                                     Class X Remic 38-3735256
                    Delaware                         Grantor Trust 61-6322801
           (State or other jurisdiction                  (I.R.S. Employer
      of incorporation or organization                Identification Number
               of issuing entity)                        of issuing entity)

          85 Broad Street
          New York, New York                                    10004
(Address of principal executive offices                     (Zip Code
          of issuing entity)                             of issuing entity)

            Telephone number, including area code of issuing entity:
                               (212) 902-1000

          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 [ ]  No[X]

     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[ ] No[X]

     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.  Yes [X]  No [ ]

     Indicate by check mark if disclosure of delinquent filers pursuant to
     Item 405 of Regulation S-K is not contained herein, and will not be
     contained, to the best of the Registrant's knowledge, in definitive proxy
     or information statements incorporated by reference in Part III of the
     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, or a non-accelerated filer.  See definition
     of "accelerated filer" in Rule 12b-2 of the Exchange Act.  (Check One):

      Large accelerated filer [  ]  Accelerated Filer [  ]
      Non-accelerated Filer [X]

     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 of the last business day of
     the registrant's most recently completed second fiscal quarter.

     Not Applicable.

     DOCUMENTS INCORPORATED BY REFERENCE

     None.

                                     PART I

     ITEM 1.  Business.

     Not Applicable.

     ITEM 1A.  Risk Factors.

     Not Applicable.

     ITEM 1B.  Unresolved Staff Comments.

     None.

     ITEM 2.  Properties.

     Not Applicable.

     ITEM 3.  Legal Proceedings.

     Not Applicable.

     ITEM 4.  Submission of Matters to a Vote of Security Holders.

     Not Applicable.

                                     PART II

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

     Not Applicable.

     ITEM 6.  Selected Financial Data.

     Not Applicable.

     ITEM 7.  Management's Discussion and Analysis of Financial Condition and
     Results of Operation.

     Not Applicable.

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

     Not Applicable.

     ITEM 8.  Financial Statements and Supplementary Data.

     Not Applicable.

     ITEM 9.  Changes in and Disagreements with Accountants on Accounting and
     Financial Disclosure.

     Not Applicable.

     ITEM 9A.  Controls and Procedures.

     Not Applicable.

     ITEM 9A(T).  Controls and Procedures.

     Not Applicable.

     ITEM 9B. Other Information.

     None.

                                   PART III

     ITEM 10.  Directors, Executive Officers and Corporate Governance.

     Not Applicable.

     ITEM 11.  Executive Compensation.

     Not Applicable.

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

     Not Applicable.

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

     Not Applicable.

     ITEM 14.  Principal Accounting Fees and Services.

     Not Applicable.

     Additional Disclosure Item For Regulation AB

     Item 1112(b) of Regulation AB, Significant Obligor Financial Information.

     No single obligor represents 10% or more of the pool assets held by the
     issuing entity.

     Item 1114(b)(2) and Item 1115(b) of Regulation AB, Significant
     Enhancement Provider Information.

     None.

     Item 1117 of Regulation AB, Legal Proceedings.

     None.

     Item 1119 of Regulation AB, Affiliations and Certain Relationships and
     Related Transactions.

     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, Compliance with Applicable Servicing Criteria.

     a) See Exhibits 33 and 34.

     b) Material instances of noncompliance:

        National City Home Loan Services, Inc. has complied, in all material
        respects, with the applicable servicing criteria as of and for the
        period ended December 31, 2006, except for 1122(d)(1)(i) pertaining
        to policies and procedures to monitor any performance or other triggers
        in accordance with the transaction agreements although daily
        delinquency and static pool reports exist but were not utilized to
        calculated the triggers, 1122(d)(4)(x)A where 5 of 60 escrow accounts
        sampled were not analyzed within a 12 month period, but where 4 accounts
        were analyzed within 1 week after said deadline; and for 1122(d)(4)(x)C,
        2 of 60 escrow accounts sampled, where escrow funds were not returned
        within 30 days after payoff, but were returned within 34 and 67 days,
        respectively, after payoff.

        First American Real Estate Solutions of Texas, L.P. assessed its
        compliance with the Applicable Servicing Criteria for the Reporting
        Period and has identified a material instance of noncompliance with the
        servicing criterion set forth in Section 229.1122(d)(2)(vii)(B) of the
        CFR with respect to the Platform.  Specifically, First American Real
        Estate Solutions of Texas, L.P. did not prepare reconciliations for
        all asset-backed securities related bank accounts within 30 calendar
        days after the bank statement cut-off date or such number of days
        specified in the transaction agreements.

     Item 1123 of Regulation AB, Servicer Compliance Statement.

     See Exhibit 35.1

                                     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)

         Exhibit 4.1 Pooling and Servicing Agreement, dated as of March 1, 2006,
         by and among GS Mortgage Securities Corp., as depositor, National City
         Home Loan Services, Inc., as servicer, and Deutsche Bank National Trust
         Company, as trustee (Filed as Exhibit 4 to Form 8-K on April 14, 2006,
         and incorporated by reference herein.)

         Exhibit 10.1  Assignment, Assumption and Recognition Agreement, dated
         as of March 30, 2006, by and between GS Mortgage Securities Corp.,
         Goldman Sachs Mortgage Company and First Franklin Financial
         Corporation (Filed as Exhibit 10.1 to Form 8-K on April 14, 2006,
         and incorporated by reference herein.)

         Exhibit 10.2  Flow Mortgage Loan Purchase and Warranties Agreement,
         dated as of February 27, 2004, by and between First Franklin Financial
         Corporation and Goldman Sachs Mortgage Company, as amended by Amendment
         No. 1 to the Purchase Agreement, dated November 29, 2004, and Amendment
         No. 2 to the Purchase Agreement, dated January 20, 2006, by and between
         First Franklin Financial Corporation and Goldman Sachs Mortgage Company
        (Filed as Exhibit 10.2 to Form 8-K on April 14, 2006, and incorporated
         by reference herein.)

         Exhibit 10.3  ISDA Master Agreement, dated as of March 30, 2006, by
         and between Goldman Sachs Mitsui Marine Derivatives Products, L.P.,
         the swap provider, and Deutsche Bank National Trust Company, the
         trustee (Filed as Exhibit 10.3 to Form 8-K on April 14, 2006, and
         incorporated by reference herein.)

         Exhibit 10.4  Schedule to the Master Agreement, dated as of March 30,
         2006, by and between Goldman Sachs Mitsui Marine Derivatives Products,
         L.P., the swap provider, and Deutsche Bank National Trust Company, the
         trustee (Filed as Exhibit 10.4 to Form 8-K on April 14, 2006, and
         incorporated by reference herein.)

         Exhibit 10.5  Confirmation, dated as of March 2, 2006, by and among
         Goldman Sachs Capital Markets, L.P., Goldman Sachs Mitsui Marine
         Derivatives Products, L.P., the swap provider, Goldman Sachs Mortgage
         Company, L.P., and Deutsche Bank National Trust Company, the trustee
         (Filed as Exhibit 10.5 to Form 8-K on April 14, 2006, and incorporated
         by reference herein.)

         Exhibit 31 Section 302 Certification.

         Exhibit 33.1 National City Home Loan Services, Inc.'s  Annual Report
         on Assessment of Compliance for Year End December 31, 2006.

         Exhibit 33.2 First American Real Estate Solutions of Texas, L.P.'s
         Annual Report on Assessment of Compliance for Year End
         December 31, 2006.

         Exhibit 33.3 Assurant Inc.'s Annual Report on Assessment of
         Compliance for Year End December 31, 2006.

         Exhibit 33.4 Deutsche Bank National Trust Company's Annual Report
         on Assessment of Compliance for Year End December 31, 2006.

         Exhibit 34.1 Attestation Report on Assessment of Compliance with
         Servicing Criteria for National City Home Loan Services, Inc.'s
         Report (Exhibit 33.1)for Year End December 31, 2006.

         Exhibit 34.2 Attestation Report on Assessment of Compliance with
         Servicing Criteria for First American Real Estate Solutions of Texas,
         L.P.'s Report (Exhibit 33.2) for Year End December 31, 2006.

         Exhibit 34.3 Attestation Report on Assessment of Compliance with
         Servicing Criteria for Assurant Inc.'s Report (Exhibit 33.3) for
         Year End December 31, 2006.

         Exhibit 34.4 Attestation Report on Assessment of Compliance with
         Servicing Criteria for Deutsche Bank National Trust Company's
         Report (Exhibit 33.4) for Year End December 31, 2006.

         Exhibit 35.1 National City Home Loan Services, Inc.'s  Annual
         Statement of Compliance for Year End December 31, 2006.

     (b) See (a) above.

     (c) Not Applicable.








                                      SIGNATURE

          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.


                               By: GS Mortgage Securities Corp.,
                                          as Depositor

                                      By:  /s/ Michelle Gill
                                           Michelle Gill
                                           Vice President


     Date: March 30, 2007







     EXHIBIT INDEX

     Exhibit Document

       4.1 Pooling and Servicing Agreement, dated as of March 1, 2006, by and
           among GS Mortgage Securities Corp., as depositor, National City
           Home Loan Services, Inc., as servicer, and Deutsche Bank National
           Trust Company, as trustee (Filed as Exhibit 4 to Form 8-K on
           April 14, 2006, and incorporated by reference herein.)

      10.1 Assignment, Assumption and Recognition Agreement, dated as of March
           30, 2006, by and between GS Mortgage Securities Corp., Goldman Sachs
           Mortgage Company and First Franklin Financial Corporation (Filed as
           Exhibit 10.1 to Form 8-K on April 14, 2006, and incorporated by
           reference herein.)

      10.2 Flow Mortgage Loan Purchase and Warranties Agreement, dated as of
           February 27, 2004, by and between First Franklin Financial
           Corporation and Goldman Sachs Mortgage Company, as amended by
           Amendment No. 1 to the Purchase Agreement, dated November 29, 2004,
           and Amendment No. 2 to the Purchase Agreement, dated January 20,
           2006, by and between First Franklin Financial Corporation and
           Goldman Sachs Mortgage Company (Filed as Exhibit 10.2 to Form 8-K
           on April 14, 2006, and incorporated by reference herein.)

      10.3 ISDA Master Agreement, dated as of March 30, 2006, by and between
           Goldman Sachs Mitsui Marine Derivatives Products, L.P., the swap
           provider, and Deutsche Bank National Trust Company, the trustee
          (Filed as Exhibit 10.3 to Form 8-K on April 14, 2006, and
           incorporated by reference herein.)

      10.4 Schedule to the Master Agreement, dated as of March 30, 2006, by
           and between Goldman Sachs Mitsui Marine Derivatives Products, L.P.,
           the swap provider, and Deutsche Bank National Trust Company, the
           trustee (Filed as Exhibit 10.4 to Form 8-K on April 14, 2006, and
           incorporated by reference herein.)

      10.5 Confirmation, dated as of March 2, 2006, by and among Goldman
           Sachs Capital Markets, L.P., Goldman Sachs Mitsui Marine
           Derivatives Products, L.P., the swap provider, Goldman Sachs
           Mortgage Company, L.P., and Deutsche Bank National Trust Company,
           the trustee  (Filed as Exhibit 10.5 to Form 8-K on April 14, 2006,
           and incorporated by reference herein.)

      31   Section 302 Certification.

      33.1 National City Home Loan Services, Inc.'s  Annual Report on
           Assessment of Compliance for Year End December 31, 2006.

      33.2 First American Real Estate Solutions of Texas, L.P.'s
           Annual Report on Assessment of Compliance for Year End December
           31, 2006.

      33.3 Assurant Inc.'s Annual Report on Assessment of Compliance for
           Year End December 31, 2006.

      33.4 Deutsche Bank National Trust Company's Annual Report on
           Assessment of Compliance for Year End December 31, 2006.

      34.1 Attestation Report on Assessment of Compliance with
           Servicing Criteria for National City Home Loan Services, Inc.'s
           Report (Exhibit 33.1) for Year End December 31, 2006.

      34.2 Attestation Report on Assessment of Compliance with
           Servicing Criteria for First American Real Estate Solutions
           of Texas, L.P.'s  Report (Exhibit 33.2) for Year End
           December 31, 2006.

      34.3 Attestation Report on Assessment of Compliance with
           Servicing Criteria for Assurant Inc.'s Report (Exhibit 33.3)
           for Year End December 31, 2006.

      34.4 Attestation Report on Assessment of Compliance with Servicing
           Criteria for Deutsche Bank National Trust Company's Report
          (Exhibit 33.4) for Year End December 31, 2006.

      35.1 National City Home Loan Services, Inc.'s Annual Statement
          of Compliance for Year End December 31, 2006.