[6] On day one of swimming at the 2022 Commonwealth Games, in Birmingham, England, Gallagher ranked ninth in the preliminaries of the 100 metre butterfly, qualifying for the semifinals with a time of 59.29 seconds.

[10] Later in the same session, she anchored the 4×100 metre freestyle relay with a 54.73 in the final to help place fourth.

[11] On day three, she qualified for the semifinals of the 50 metre butterfly, ranking tenth in the preliminaries with a time of 26.96 seconds.

[15] In her third and final event of the day, she helped place fourth in the 4×200 metre freestyle relay.

[16] Ranking thirteenth in the preliminaries of the 100 metre freestyle on day four of the 2022 Commonwealth Games, she qualified for the semifinals of the event.