GMS (also known as the Growling Mad Scientists) is a Dutch psychedelic trance duo that started in the early 1990s and consists of Shajahan Matkin (also known as Riktam) and Joseph Quinteros (also known as Bansi) Amsterdam, Holland. GMS founded Spun Records in 1999, the first psychedelic trance label in the United States and Ibiza, Spain. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.