The Jobuilt Mammatus is a single-engine general-aviation airplane from Grand Theft Auto V and GTA Online that is due to appear in Grand Theft Auto VI, visible in artwork on the Leonida Keys section of the promotional website. Its design is inspired by various Cessna models, including the 172 Skyhawk, 177 Cardinal, and 182 Skylane.
Vehicle data via GTA Wiki (Fandom), CC BY-SA 3.0.