I finished it on PC about two months ago, it's still a masterpiece.
There's a mod pack that restores the visual effects from the 360 version, brings back all the music and fixes the 60 FPS mode. The definitive way to play.
I hope there's an actual PS5 version and they don't do what they did with the red dead remaster and limit it to last gen only for who the fuck knows what reason.
RDR is 4K/60 on PS5, right? It was essentially just a framerate and resolution bump as far as I remember and I doubt that GTA IV will be any different which is fine by me.
GTA IV is my favorite GTA (IV>VC>SA>III>V>who cares about anything else) and I'll happily play through again for trophies.