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-GC34 (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:



Wells
Fargo Bank, National Association, as Master Servicer, LNR Partners, LLC, as Special Servicer, U.S. Bank Trust Company, National Association, as Trustee, U.S. Bank Trust Company, National Association,
as Certificate Administrator, U.S. Bank National Association, as Custodian, Pentalpha Surveillance
LLC, as Operating Advisor, CoreLogic Solutions, LLC, as Servicing Function Participant, Berkeley Point Capital LLC d/b/a Newmark,
as Primary Servicer, Wells Fargo Bank, National Association, as Primary Servicer for the Hammons Hotel Portfolio Mortgage Loan,
LNR Partners, LLC, as Special Servicer for the Hammons Hotel Portfolio Mortgage Loan, Deutsche Bank Trust Company Americas, as
Trustee for the Hammons Hotel Portfolio Mortgage Loan, Deutsche Bank Trust Company Americas, as Custodian for the Hammons Hotel
Portfolio Mortgage Loan, Situs Holdings, LLC, as Operating Advisor for the Hammons Hotel Portfolio Mortgage Loan, CoreLogic Solutions,
LLC, as Servicing Function Participant for the Hammons Hotel Portfolio Mortgage Loan, Wells Fargo Bank, National Association,
as Primary Servicer for the Illinois Center Mortgage Loan, LNR Partners, LLC, as Special Servicer for the Illinois Center Mortgage
Loan, Deutsche Bank Trust Company Americas, as Trustee for the Illinois Center Mortgage Loan, Deutsche Bank Trust Company Americas,
as Custodian for the Illinois Center Mortgage Loan, Situs Holdings, LLC, as Operating Advisor for the Illinois Center Mortgage
Loan, and CoreLogic Solutions, LLC, as Servicing Function Participant for the Illinois Center Mortgage Loan.







| | Dated:
    March 26, 2024                                         | 
| | ----------------------------------------------------------------- | 
| |                                                                   | 
| | /s/
    Scott Epperson                                           
| | Scott Epperson                                                    | 
| |                                                                   | 
| | Chief
    Executive Officer                                       | 
| | (senior
    officer in charge of securitization of the depositor) |