GG-class units were a specific model of service droid. One such droid of the GG-class worked at the home of the mayor of Gorse City on the planet Gorse around 11 BBY. It served beverages to guests during a party held at the mayor's residence after the death of Count Denetrius Vidian. After the Battle of Yavin, another GG-class droid was present at the wedding of Moff Jaccun Pereez's daughter, Famma, and Commander Yendiv Bensek, functioning as a spy for Inferno Squad.
The GG-class serving droids debuted in Legends with their appearance in Knights of the Old Republic 11. They were then brought into canon through the 2014 novel A New Dawn. John Jackson Miller was the author of both of these initial appearances. Later, a GG-class serving droid made an appearance in Battlefront II: Inferno Squad, a 2017 novel written by Christie Golden.