Gay was born and raised in Crookwell, New South Wales near Goulburn and educated at Crookwell District Rural School. He attended Newington College (1962-1967) in Sydney as a boarding student before studying accountancy and wool classing. He is married to Katie and they have two children.
Prior to his political career, Gay owned a small trucking company and managed his family’s grazing property at Crookwell.
There is a prominent Antony Gormley statue dedicated to Turing in the college grounds, while a painting of Keynes by his lover DuncanGrant hangs proudly next to paintings of Forster and other gay fellows in the grand college dining hall.