Avid supporter of the Australian NRL team Sydney Roosters.
College teammate and roommate of NFL players Kassim Osgood, and Heath Farwell. They all remain close friends.
Gray-Hayward's father is actor Chard Hayward (best known for having starred in the Australian series Number 96 (1972) from 1973-77) and his mother, Sarah Gray, is former Miss Australia 1975.