At the age of nine, Collingwood went through surgery to remove a brain tumour from her right frontal lobe. While she was recovering, Brisbane Lions player Jonathan Brown visited her, which inspired her later to play Australian rules football.[11] From a young age, she was a Brisbane Lions supporter.[1]
^"Thank You Jesse & Lulu". Brisbane Lions. Telstra. 9 March 2023. The Brisbane Lions have also informed Gabby Collingwood, Ava Seton and Maggie Harmer that they will not be offered a playing contract for the upcoming season.