@Pinauen Like I said, @ArthurLopes may know how to do this, but there's other GTA5 map modders out there who maybe able to port it for you. I actually have no idea how to port maps to GTA5. Trust me, if I could make GTA5 work on a 250gb Linux system, I'd spend my time figuring out how to create maps, but... I can't. That'd be painful just installing it again.
But anyways, there's people out there who port maps. If you can find them, they may be able to port a map for you.