Is GTA VI confirmed for Game Pass or PlayStation Plus?
No subscription launch has been announced.
The confirmed launch information lists retail editions, not day-one inclusion in a game subscription.
The evidence
No announcement found in the sources checked on the verification date.
Rockstar Games SupportGrand Theft Auto VI platforms, editions, and versionsRockstar GamesGrand Theft Auto VI official siteRead the full supporting guideWhat would change this answer?
A Rockstar, Xbox, or PlayStation subscription announcement.