Varley founded LFO in 1990 with Mark Bell, whom he had known since 1984. Their first release LFO was released by Warp Records in 1990 and reached the British single charts.
During the mid-1990s Varley focused on his solo productions. His debut album Kushti was released in 1996 as G-Man. In the same year Varley left LFO. He released music on his own imprint G Records as well as on the German labels Studio K7 and Force Inc. Music Works.
In 1999 Varley moved to Wiesbaden, Germany. In 2000 he founded the label GMR Records.