Gillian Porter has 4 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| TCS London Marathon 2026 | Marathon | 5:38:43 | 49203 | |
| TCS London Marathon 2025 | Marathon | 5:55:04 | 48693 | |
| TCS London Marathon 2023 | Marathon | 4:59:14 | 35412 | |
| TCS London Marathon 2022 | Marathon | 4:57:39 | 26924 |