Gallios, situated in the Outer Rim Territories, was a planet visited by the droids 0-0-0 and BT-1 sometime between 3 ABY and 4 ABY, where they instigated significant mayhem. The rebel astromech droid C1-10P learned via the HoloNet of a murderous droid on Gallios, which turned out to be 0-0-0, and relayed this information to R2-D2, a fellow rebel droid. R2-D2 was in the process of forming a team to assist his associate, the protocol droid C-3PO, who had been corrupted by the influence of the Scourge. Subsequently, R2-D2 journeyed to Gallios and encountered 0-0-0 there.