Bas are a species in the Dragonball universe that work for the PTO. Guldo is the most high-ranking member as he is a member of the Ginyu Force. Guldo is a mutant Bas and the strongest member from their home planet.
The species name comes from Dragon Ball Z: The Anime Adventure Games and also the Ocean dub.
Guldo's race have the distinct ability to be able to stop time for as long as they can hold their breath. The species also has telekinetic abilities. Guldo was also able to survive as just a head and even sweat and gasp when Vegeta was about to blast him, though it is unknown how long they can survive without their body.