GS-8 was an RA-7 protocol droid who served Senator Avi Singh of the Confederacy of Independent Systems on the planet Raxus Secundus. Following the formation of the Galactic Empire, the planet fell under Imperial occupation, led by Captain Bragg. After Singh was imprisoned for speaking out against the occupation, GS-8 escaped, calling for help. The informant Ciddarin Scaleback received the message, sending the unit of former clone commandos known as the Bad Batch to meet with GS-8 outside the capital city of Raxulon. The Bad Batch entered Singh's residence and rescued the senator, escaping in an All Terrain Tactical Enforcer. Though they were pursued by Imperial forces, they managed to return to the Bad Batch's starship, Marauder, and escaped from Raxus. GS-8 and Singh accompanied the Bad Batch to Ord Mantell, where they met with Scaleback, who inquired about payment.
GS-8 appeared in "Common Ground," the tenth episode of the series Star Wars: The Bad Batch, released on Disney+ on July 2, 2021. She was voiced by Sian Clifford. In one shot of the episode's opening scene, GS-8 is depicted as standing behind Captain Bragg despite previously having fled as Singh was subdued.