Rockstar Games officially confirmed that the next game in GTA franchise is in development.
With the unprecedented longevity of GTA 5, we know many of you
have been asking us about a new entry in the Grand Theft Auto
series. With every new project we embark on, our goal is always
to significantly move beyond what we have previously delivered
— and we are pleased to confirm that active development for the
next entry in the Grand Theft Auto series is well underway. We
look forward to sharing more as soon as we are ready, so please
stay tuned to the Rockstar Newswire for official details.
On behalf of our entire team, we thank you all for your
support and cannot wait to step into the future with you!
— Rockstar Games
This is the first time Rockstar mentioned next chapter in Grand Theft Auto series. The developers didn't mention the official title for GTA 6 so it could be something else.