Established insider and data miner TezFunz shared his thoughts on GTA 6 development. He also answered a fan question about supposedly rebooted development of the game. TezFunz seems confident that GTA 6 will be released in next two years.
In current times where you hear of Rockstar improving working
conditions and trying to reduce crunch. Do you really think a
reboot would happen when we are like a year or a year and a
half away from release?
— TezFunz
There were some rumors about GTA 6 release date before. Some competent insiders with Tom Henderson and Jason Schreier are also sure that new game will be released in 2023-2024 window.