Following the defeat of the Bitthævrians in the Kaleesh-Bitthævrian War, the warlords of the victorious Kaleesh (of which General Grievous was a member) took roggwarts as trophies from the Bitthævrian homeworld of Guiteica. One such roggwart came into the possession of Grievous, who named it "Gor." During the Clone Wars, Grievous kept Gor within his castle on the third moon of the Outer Rim world Vassek. Gor served as a guard alongside Grievous's battle droids and was outfitted with battle armor and four mechanical arms that were mounted on his back.
General Kit Fisto, Jedi Knight Nahdar Vebb, and a squad of clone troopers under the command of Clone Commander Fil infiltrated the castle around 22 BBY. The general soon arrived, and was badly damaged by the Republic and Jedi forces. He retreated deep into his castle to be repaired by his medical droid; before beginning his repairs, Grievous released Gor into the corridors of the castle to hunt down the intruders. The roggwart found Fisto, Vebb, and Fil in one of the castle's large rooms and attacked them. Fil fired on Gor several times, but its tough hide and armor rendered the blaster shots ineffective. An aggravated Gor lunged at Fisto, disarming the Nautolan Jedi Master.
As the three intruders surrounded Gor, Fil continued to shoot at the roggwart's neck. Vebb drove his lightsaber into the creature's back, which did little to slow Gor, who quickly bucked Vebb off and grabbed Fil with his prehensile tail, flailing the clone about. Vebb again approached Gor and was again beaten back, this time by the creature's tail that held Fil. Fisto, who had regained his lightsaber, sliced at Gor's face, causing the roggwart to slam Fil into the ground. Vebb rushed forward again, this time slicing off Gor's tail and freeing Fil, who perished from his wounds. Fisto also attacked Gor, who had been distracted by the loss of his tail, slicing off the creature's two front limbs. Gor fell to the ground in pain and was quickly killed by Fisto via a lightsaber stab to the throat. When Grievous's repairs were completed, the general attempted to see if Gor had finished "playing" with the Jedi, only to discover that Gor had been slain—a revelation that greatly upset the general.
- Star Wars: The Clone Wars--"Lair of Grievous" (First Appearance)
- Star Wars: The Clone Wars--"Lair of Grievous"