The GNK-series power droid, frequently called the gonk droid, represented a popular model of power droid produced by Industrial Automaton. Their "gonk" sound led to the common nickname of gonk droids. The Alliance to Restore the Republic made alterations to some GNK units, repurposing them as mobile explosive devices. These modified droids would advance methodically across battle zones, detonating upon impact with enemy structures. They are commonly spotted on Tatooine, performing tasks on moisture farms or within bustling spaceports such as Mos Eisley. Furthermore, gonk droids can serve as makeshift tables for board games or platforms for equipment such as a payment dispenser.
Notable examples of GNK droids include 4B-EG-6, Gonky, Gonky belonging to Clone Force 99, and a gray GNK power droid present at Jabba's Palace circa 4 ABY. This particular droid emitted painful squeals as 8D8, acting under the direction of its supervisor droid EV-9D9, inflicted torture by pressing a searing hot iron against the soles of its feet.