GMS (also known as the Growling Mad Scientists) is a Dutch psychedelic trance duo which has attained significant popularity from the early 1990s to the present time. Formed by Shajahan Matkin (also known as Riktam) and Joseph Quinteros (also known as Bansi) in the city of Amsterdam, the duo has attracted a large international fanbase. In 1997 they moved to ibiza, where they live since then. GMS founded Spun Records in 1999, the first psychedelic trance label in the United States and Ibiza, Spain. Director Tony Scott used GMS tracks in his films Man on Fire, Domino and Unstoppable. GMS won the Psy-Trance award twice (in 2001 and 2009) at the Pacha Ibiza DJ Awards.