| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| GPX | EVP & Chief Financial Officer | Oct 14, 2021 | Option Exercise | $20.85 | 2,456 | 51,208 | 0 | Oct 18, 2021, 03:17 PM |
| GPX | EVP & Chief Financial Officer | Oct 14, 2021 | Option Exercise | $20.85 | 81,151 | 1,691,998 | 67,024 | Oct 18, 2021, 03:17 PM |
| GPX | EVP & Chief Financial Officer | Apr 01, 2021 | Option Exercise | $17.55 | 1,206 | 21,165 | 81,151 | Apr 05, 2021, 04:25 PM |
| GPX | EVP & Chief Financial Officer | Dec 31, 2019 | Option Exercise | $13.23 | 203 | 2,686 | 4,589 | Jan 03, 2020, 12:00 AM |
| GPX | EVP & Chief Financial Officer | Dec 31, 2018 | Option Exercise | $12.61 | 286 | 3,606 | 4,792 | Jan 03, 2019, 12:00 AM |
| GPX | EVP & Chief Financial Officer | Nov 05, 2018 | Option Exercise | $14.76 | 236 | 3,483 | 5,078 | Nov 07, 2018, 04:07 PM |
| GPX | Chief Financial Officer | Dec 31, 2017 | Option Exercise | $23.20 | 228 | 5,290 | 5,314 | Jan 03, 2018, 12:00 AM |
| Symbol | Relationship | Date | Transaction | Value($) |
| GPX | EVP & Chief Financial Officer | Oct 14, 2021 | Option Exercise | 51,208 |
| GPX | EVP & Chief Financial Officer | Oct 14, 2021 | Option Exercise | 1,691,998 |
| GPX | EVP & Chief Financial Officer | Apr 01, 2021 | Option Exercise | 21,165 |
| GPX | EVP & Chief Financial Officer | Dec 31, 2019 | Option Exercise | 2,686 |
| GPX | EVP & Chief Financial Officer | Dec 31, 2018 | Option Exercise | 3,606 |
| GPX | EVP & Chief Financial Officer | Nov 05, 2018 | Option Exercise | 3,483 |
| GPX | Chief Financial Officer | Dec 31, 2017 | Option Exercise | 5,290 |