Career
Gunnyon played four seasons with South Fremantle in the West Australian Football League, playing 54 games. He represented Western Australia in the 1921 Perth Carnival. In 1922 Gunnyon transferred to Street Kilda in the VFL going on to play 63 games for the club, the latter games in an unfamiliar defensive role.
He left the club for the VFA in 1927 where he joined the newly established Oakleigh.
Gunnyon enlisted with the Australian Imperial Force in November 1915, serving in France.