| CUSIP No. 37953N108 | 13G | Page 31 of 34 Pages |
Exhibit 1
JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)
The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him, her or it contained herein, but shall not be responsible for the completeness and accuracy of the information concerning the other entities or persons, except to the extent that he, she or it knows or has reason to believe that such information is inaccurate.
Date: February 16, 2016
| HIGHVISTA STRATEGIES, LLC | ||
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA GP, LLC | ||
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA GP LIMITED PARTNERSHIP | ||
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA GP II LIMITED PARTNERSHIP | ||
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA GP III LIMITED PARTNERSHIP | ||
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA I LIMITED PARTNERSHIP | ||
| By: | HighVista GP Limited Partnership | |
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| CUSIP No. 37953N108 | 13G | Page 32 of 34 Pages |
| HIGHVISTA II LIMITED PARTNERSHIP | ||
| By: | HighVista GP Limited Partnership | |
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA III, LTD. | ||
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Director | ||
| HIGHVISTA V LIMITED PARTNERSHIP | ||
| By: | HighVista GP Limited Partnership | |
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA VI LIMITED PARTNERSHIP | ||
| By: | HighVista GP II Limited Partnership | |
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Manager | ||
| HIGHVISTA LIQUID MULTI-ASSET FUND – MODERATE (CAYMAN), LTD. | ||
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Director | ||
| HIGHVISTA 1.5 (OFFSHORE) LTD. | ||
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Director | ||
| HIGHVISTA 1.5 (U.S.) LP | ||
| By: | HighVista GP III Limited Partnership | |
| By: | HighVista GP, LLC | |
| By: | /s/ Brian H. Chu | |
| Name: Brian H. Chu | ||
| Title: Director | ||
| CUSIP No. 37953N108 | 13G | Page 33 of 34 Pages |
| XL RE LTD | ||
| By: | /s/ Mark Berry | |
| Name: Mark Berry | ||
| Title: Director | ||
/s/ Brian H. Chu | ||
| Brian H. Chu | ||
/s/ André F. Perold | ||
| André F. Perold | ||
