Gorc was a Force-sensitive Gamorrean male native of the planet Pzob. After leaving his homeworld with his older brother Thok, Gorc traveled the galaxy, serving first as a test subject for a scientist named Pineas Pontak, and later as an enforcer for the Hutt crime lord Jabba Desilijic Tiure on the planet Tatooine. However, when the brothers found themselves in trouble after a cantina fight, Gorc was sold out to the Galactic Empire by Thok. The Gamorrean was subsequently mutated into Sithspawn by Galactic Emperor Palpatine's "monster-maker" Cronal. As a result of his mutation, Gorc shared genes, abilities, and characteristics and had a symbiotic link through the Force with his fellow test subject, the Kowakian monkey-lizard Picaroon C. Boodle. Because of that connection, Gorc and Pic were eventually dubbed "the Brothers of the Sith." The "twins" were pressed into service of the Miraluka Inquisitor Jerec and, as part of his Dark Jedi team, helped him in the search for the long-lost Valle
