The official GTA mobile offerings available through the Apple App Store and Google Play are limited to older titles: GTA: Liberty City Stories, GTA: Chinatown Wars, and the recently released GTA: The Trilogy – The Definitive Edition (exclusive to Netflix subscribers). Neither GTA V nor GTA VI has an official mobile port, and neither does GTA 7.
Select one of those and I'll build it out. gta 7 mobile
