| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:38.46 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 100m Breaststroke | 1:53.82 | BAC Team Showdown 2025 | 2025-12-12 |
| 100m Butterfly | 1:50.77 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 200m Backstroke | 3:30.24 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 200m Breaststroke | 3:59.20 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 200m Freestyle | 3:17.56 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 200m IM | 3:34.01 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 400m Freestyle | 7:03.56 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
| 50m Backstroke | 44.88 | BAC Team Showdown 2025 | 2025-12-12 |
| 50m Butterfly | 47.57 | BAC Team Showdown 2025 | 2025-12-12 |
| 50m Freestyle | 38.31 | Wilmot Aces Spring Classic 2026 | 2026-03-13 |
Johnson, Gwendolyn's top personal bests include 100m Backstroke (1:38.46), 100m Breaststroke (1:53.82), 100m Butterfly (1:50.77), 200m Backstroke (3:30.24), 200m Breaststroke (3:59.20).
Johnson, Gwendolyn swims for Middlesex Swimming.
Johnson, Gwendolyn has competed in 2 meets.