Former members have been Sebastian Claro, who left the group after a two-year stint, and Yakov Biton from Israel, who left the group after the completion of Chaos Laboratory.
G.M.S. began when Riktam and Bansi met in high school at age 14 in Amsterdam. Both were passionate about electronic music and the duo chose to leave school and seek their education in the club scene. Even though they were too young to legally enter a nightclub, Riktam and Bansi began spinning at clubs in Amsterdam. On most occasions, they had to be whisked into the building's side door to avoid scrutiny by the authorities.
Amsterdam's club/rave scene was in its infancy In the early 90's and genres like gabber dominated the fledgling culture.
Two years later, Riktam and Bansi traveled to Goa and experienced a musical epiphany. It was in Goa, India they started playing goa trance. While there, Riktam and Bansi deejayed at some of the wildest, most memorable parties of their young lives.
After returning to Amsterdam, one of their friends had purchased some recording equipment. They started their production career and named themselves G.M.S.
In 1997, they moved to Ibiza, Spain and in 2000, Riktam and Bansi formed Spun Records with partner Seth Hoffman.