[7] He made his debut for the club on 25 August 2021, starting in a 6–0 EFL Cup second round defeat to Arsenal.
[8] He made his league debut for the club on 3 November 2021, starting at right wing-back as a replacement for the suspended Darnell Furlong in a 1–0 win over Hull City.
[11] On 22 August 2023, Hickman joined Bristol City on a season long loan with an option to buy.
[14] Gardner-Hickman joined recently relegated League One club Birmingham City on 23 August 2024 on loan for the rest of the season.
[15] The deal included an option to buy the player at the end of the season, which Birmingham confirmed on 3 February 2025 that they would be taking up.