He trained as a registered nurse and has studied complementary healing methods such as reflexology. He was initiated into Seax-Wicca in 1986. He is currently developing the theory that Wicca may have some roots in tribal shamanistic healing traditions, as opposed to medieval ritual magic.

Bone first met Janet Farrar and Stewart Farrar in 1989 at a Pagan camp at Groby, near Leicester, where they struck up a friendship. He accompanied them on a tour of the United States in 1992, and on their return he moved to Ireland and became their business partner. He joined the Farrars as part of a "polyfidelitous relationship", and has continued in both the personal and professional relationship since Stewart's death on February 7, 2000. He co-authored several books with the Farrars, and he is the production manager for their videos. He also set up their website in 1996, which has become the “Pagan Information Network”, a contact network for Pagans across the Republic and Northern Ireland, for which Gavin and Janet Farrar are the primary coordinators.

Gavin Bone and Janet Farrar are active members in The Aquarian Tabernacle Church of Ireland, and have links with several covens in the United States, Australia, New Zealand and Europe. They ran a progressive coven in Ireland called Coven Na Callaighe until early 2009 which was part of Teampall Na Callaighe, which once included an open worship group Clan Na Callaighe.