The G2 repair droid, also known as the "Goose droid", was a custom-built droid employed by the Star Tours travel agency and manufactured by the SoroSuub company on Sullust.
The G2s nickname resulted because of its low walk from its wide, heavy bottom combined with their multi-jointed neck, so they look like geese.
At Star Tours, G2 repair droids performed multiple tasks, but were primarily used to repair machinery and other droids. Programmed with artificial personalities, the G2 droids were known to exchange witticisms for the amusement of Star Tours customers.
As mentioned, the droids were known and enjoyed because of their excessive chattiness, to the extent of some owners relieving their G2s jobs to just being a companion. This excessive chattiness could also have been bad for the droids, an example being a group of G2s stealing a fueling freighter and starting a community on an asteroid in the Chrellis system.