Gongzilla is one of many Gong offshoots. It got its start from the incarnation of Gong led by Pierre Moerlen in the 80s (Pierre Moerlen's Gong). The driving force behind Gonzilla is the duo of guitarist Bon Lozaga and bassist Hansford Rowe, and they have been joined by various other musicians over the course of their existence.

Other guests and members have included Allan Holdsworth, Benoit Moerlen, Bobby Thomas Jr, Gary Husband, and David Torn.