I plan to try to get this working tomorrow. If someone else has any luck, let me know! This is supposedly only supporting the Rift currently. There have been attempts to play this back in 2016 and some videos from earlier this year. But they all seem buggy and lack both immersion and depth perception. So the version posted here is as close to the "real deal for VR" as it gets for the moment.
GTA V is a masterpiece. In my opinion, it builds one of the most believable, enjoyable and detailed virtual worlds ever created in videogame. So, it pained me a lot that I couldn't experience it properly in VR. There were a couple of VR mods out there, sure, but they're mostly Vive-centric, outdated and basically don't work correctly anymore, or at least I couldn't make them work well enough to get the feeling of immersion that I craved. I was looking for a mod that would allow me to play the FULL game from start to 100% completion on my Rift, and to leisurely spend my time strolling or driving through the incredible locations of Los Santos and Blaine County, with a feel that was as close as possible to that of a native VR game.
Since I couldn't find any suitable solutions, I built one myself. If you wish, you too can now enjoy the results by going to my GitHub release page and following the quick setup instructions given at the start of the README. My mod is standalone and doesn't need vorpX or anything else installed, apart from the original game of course.