GTFO has been updated to version 6.0 rundown today by 10 Chambers. You can get the complete patch notes of this update from here.
The game is finally leaving early access with this new patch. It will be a public launch from now with a discount of 25% offered to those who are preparing to buy it. The public release was shown with a gameplay trailer during The Game Awards 2021. Get the details on this update below, or take a look at the Steam forums.