EX-31
Rule 13a-14(d)/15d-14(d) Certifications.



I,
Scott Epperson, certify that:



1.
I have reviewed this report on Form 10-K and all reports on Form 10-D required to be filed in respect of the period covered by
this report on Form 10-K of the GS Mortgage Securities Trust 2015-GC30 (the “Exchange Act periodic reports”);



2.
Based on my knowledge, the Exchange Act periodic reports, taken as a whole, do not contain any untrue statement of a material
fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this report;



3.
Based on my knowledge, all of the distribution, servicing and other information required to be provided under Form 10-D for the
period covered by this report is included in the Exchange Act periodic reports;



4.
Based on my knowledge and the servicer compliance statements required in this report under Item 1123 of Regulation AB, and except
as disclosed in the Exchange Act periodic reports, the servicers have fulfilled their obligations under the servicing agreements
in all material respects; and



5.
All of the reports on assessment of compliance with servicing criteria for asset-backed securities and their related attestation
reports on assessment of compliance with servicing criteria for asset-backed securities required to be included in this report
in accordance with Item 1122 of Regulation AB and Exchange Act Rules 13a-18 and 15d-18 have been included as an exhibit to this
report, except as otherwise disclosed in this report. Any material instances of noncompliance described in such reports have been
disclosed in this report on Form 10-K.



In
giving the certifications above, I have reasonably relied on information provided to me by the following unaffiliated parties:



Midland
Loan Services, a Division of PNC Bank, National Association, as Master Servicer, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer prior to October 7, 2022, LNR Partners, LLC as Special Servicer on and after October
7, 2022, U.S. Bank National Association, as Trustee, U.S. Bank National Association, as Certificate Administrator, U.S. Bank National
Association, as Custodian, Trimont Real Estate Advisors, LLC (f/k/a Trimont Real Estate Advisors, Inc.), as Operating Advisor
prior to December 14, 2022, BellOak, LLC, as Operating Advisor on and after December 14, 2022, Berkeley Point Capital LLC d/b/a
Newmark, as Primary Servicer, Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer for the
170 Broadway Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National Association, as Special Servicer for the 170
Broadway Mortgage Loan, Deutsche Bank Trust Company Americas, as Trustee for the 170 Broadway Mortgage Loan, Deutsche Bank Trust
Company Americas, as Custodian for the 170 Broadway Mortgage Loan, Situs Holdings, LLC, as Operating Advisor for the 170 Broadway
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National Association, as Primary Servicer for the Selig Office Portfolio
Mortgage Loan, Midland Loan Services, a Division of PNC Bank, National Association, as Special Servicer for the Selig Office Portfolio
Mortgage Loan, Deutsche Bank Trust Company Americas, as Trustee for the Selig Office Portfolio Mortgage Loan, Deutsche Bank Trust
Company Americas, as Custodian for the Selig Office Portfolio Mortgage Loan, and Situs Holdings, LLC, as Operating Advisor for
the Selig Office Portfolio Mortgage Loan.







| | Dated:
    March 27, 2023                                         | 
| | ----------------------------------------------------------------- | 
| |                                                                   | 
| | /s/
    Scott Epperson                                           
| |                                                                   | 
| | Scott Epperson                                                    | 
| |                                                                   | 
| | Chief
    Executive Officer                                       | 
| | (senior
    officer in charge of securitization of the depositor) |