| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Breaststroke | 1:52.62 | Premier 3 LES Tracadie | 2026-01-24 |
| 100m Freestyle | 1:30.75 | Premier 3 LES Tracadie | 2026-01-24 |
| 100m IM | 1:38.61 | Premier # 2 – Region 1 / Première # 2 – Région 1 | 2025-12-13 |
| 200m Backstroke | 3:59.53 | Premier 3 LES Tracadie | 2026-01-24 |
| 200m Breaststroke | 3:53.75 | Premier # 2 – Region 1 / Première # 2 – Région 1 | 2025-12-13 |
| 200m Freestyle | 3:30.56 | Premier Festival | 2025-05-31 |
| 200m IM | 3:42.48 | Premier # 2 – Region 1 / Première # 2 – Région 1 | 2025-12-13 |
| 400m Freestyle | 6:56.38 | Premier # 2 – Region 1 / Première # 2 – Région 1 | 2025-12-13 |
| 50m Backstroke | 53.99 | Premier Festival | 2025-05-31 |
| 50m Breaststroke | 51.51 | Premier Festival | 2025-05-31 |
| 50m Butterfly | 51.92 | Premier Festival | 2025-05-31 |
| 50m Freestyle | 38.56 | Premier 3 LES Tracadie | 2026-01-24 |
Losier, Gabriel's top personal bests include 100m Breaststroke (1:52.62), 100m Freestyle (1:30.75), 100m IM (1:38.61), 200m Backstroke (3:59.53), 200m Breaststroke (3:53.75).
Losier, Gabriel swims for Les Espadons-Tracadie.
Losier, Gabriel has competed in 3 meets.