Story mode should be playable, there is a option to disable BattlEye in Rockstar Launcher
Rockstar replied to someone’s support request
We certainly understand that you are unable to login to GTA online through Steam Deck after the update.
We would like to inform you that the primary goal of incorporating BattlEye into GTA Online is to enhance the overall gaming experience by actively scanning for cheats and exploits, and preventing players with cheats and mods from entering online. The Steam Deck players will not be able to join GTA Online but should be able to launch single-player without any issues. We appreciate your understanding in this matter.
If you have any further questions or concerns, please feel free to let us know. We are here to assist you.
https://support.rockstargames.com/articles/33490543992467/Grand-Theft-Auto-Online-BattlEye-FAQ
Steam Deck does not support BattlEye for GTA Online
Such a crappy way of wording it and trying to blame the steam deck when BattlEye has said that they have had linux and wine support long before the steam deck came out
Official Rockstar Community (RP) Servers will not require BattlEye to play. Community Server launchers will disable BattlEye as part of their launch processes.
What makes RP servers so special that they don’t need BattlEye?
https://www.pcgamer.com/battleye-anti-cheat-confirms-steam-deck-support/
BattlEye has provided native Linux and Mac support for a long time and we can announce that we will also support the upcoming Steam Deck (Proton). This will be done on an opt-in basis with game developers choosing whether they want to allow it or not.
You don’t build an OS for an application, you build an application for an OS. It should read “BattlEye doesn’t support Steam Deck”.
I tried GTA Online once, thinking I could just cruise around and have some fun.
Within 2 minutes I was killed by some dude in a flying motorcycle rocket launcher thingy.
He then proceeded to spawn-camp me and kill me every time I came back.
Haven’t logged on since.
This shit is compatible with Linux no?
“oh no, anyway…”
GTA online was fun from 2015 until a couple years later before flying bikes and sky races. R* kept pushing updates that appeal to teenagers and absolutely ruined it.