Gavin Forrest Gardner (10 or 11 April 1848 – 20 March 1919) was a founder and longtime director of the Adelaide Stock Exchange.
At the formation of the Adelaide Stock Exchange in 1887 he was one of the original 50 members, of which number only S. E. Beach, D. Fotheringham, A. F. Weaver, and S. Wills outlasted him.
secretary and treasurer pro tem under president Henry Bellingham, and in March 1889 he was elected to the committee under George Sydney Aldridge, which seat he retained for four years.
His close involvement with the minutiae of stock trading made him something of an authority, and his advice was frequently sought and freely given.
He died after a long illness at his home "Airlie" at 9 Trinity Street, College Park, South Australia.