Gerr was a male Human Acolyte of the Sith who studied at the Sith Academy on Korriban. This occurred during the Cold War, a period of conflict between the Galactic Republic and the reconstituted Sith Empire. In 3643 BBY, he found himself in Harkun's room, summoned by the Overseer. Upon following this order, Harkun commanded Ffon Althe to execute him. Gerr attempted to flee, but Ffon unleashed Force lightning, resulting in the acolyte's death.