Suster was born 2 August 1951 in Hampstead, London, and was educated at Highgate School and Trinity Hall, Cambridge.
Gerald Suster was married twice, in 1975 to Ann Nash (marriage dissolved) and in 1992 to Michaela Antonina Duncan (1948–2001).
In 1989 he became a tutor at Boarzell Tutorial College in Sussex; however his teaching career came to an abrupt end when he was featured in an exposé of his occult activities in the News of the World newspaper on 16 April 1989.
[3] Suster sued the paper for libel, citing extensive damage to his livelihood arising from the article and various lies by the reporter Chris Blythe.
The Central London Pagan Scene held a goetic memorial for him in the upper room of The Princess Louise in Holborn, one of Suster's long-time haunts.