CUSIP No. 36269P104
 
Page 9 of 9 Pages
 
 
AGREEMENT OF JOINT FILING
 
Pursuant to Rule 13d-1(k)(1) of the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, each of the undersigned agrees that the statement on Schedule 13G filed herewith shall be filed on behalf of each of the undersigned.
 
 
 
 
MUBADALA INVESTMENT COMPANY PJSC
 
     
 
December 7, 2018
 
 
Date
 
     
 
/s/ Christopher Fazekas
 
 
Signature
 
     
  Christopher Fazekas / Authorized Signatory  
 
Name/Title
 
     
     
 
MUBADALA DEVELOPMENT COMPANY PJSC
 
     
 
December 7, 2018
 
 
Date
 
     
 
/s/ Christopher Fazekas
 
 
Signature
 
     
 
Christopher Fazekas / Authorized Signatory
 
 
Name/Title
 
     
     
 
MDC CAPITAL LLC
 
     
 
December 7, 2018
 
 
Date
 
     
 
/s/ Christopher Fazekas
 
 
Signature
 
     
 
Christopher Fazekas / Authorized Signatory
 
 
Name/Title
 
     
   
  MDC CAPITAL (CAYMAN) LIMITED, AS TRUSTEE FOR FIFTY FIRST INVESTMENT COMPANY LLC  
     
  December 7, 2018  
  Date  
     
  /s/ Christopher Fazekas  
  Signature  
     
  Christopher Fazekas / Authorized Signatory  
  Name/Title