[5] Gadecki quit playing tennis shortly afterwards, and was ultimately encouraged by fellow Australian Ash Barty to return to the sport after completing high school.

[9] In February, Gadecki won her first WTA Tour singles main-draw match at the Phillip Island Trophy.

[18] Gadecki made her debut at the Australian Open as a wildcard[19] and defeated Polina Kudermetova in the first round[20] before losing her next match to Marta Kostyuk.

[21] Partnering Jodie Burrage, she won her first WTA 125 doubles title at the Golden Gate Open, defeating Hailey Baptiste and Claire Liu in the final.

120 on 15 January 2024, prior to the 2024 Australian Open where she received a wildcard for the main draw, losing to Sloane Stephens.

[23] Partnering Olivia Nicholls, Gadecki won her first WTA Tour doubles title at the ATX Open, defeating Katarzyna Kawa and Bibiane Schoofs in the final.

177, she qualified for the Wimbledon Championships making her debut at this major[25] but suffering a straight sets loss to Robin Montgomery.

[27] She then upset second seed Danielle Collins, in straight sets in the second round, to reach her first WTA Tour quarterfinal and first at the 500-level.

[37] Partnering John Peers, Gadecki won the mixed doubles title at the Australian Open, defeating Kimberly Birrell and John-Patrick Smith in the final.