No, GTA 5 is not cross-platform. Despite Rockstar releasing several versions of the game across various storefronts and systems, you can only play GTA 5 with other players on the same system as you.

GTA 5 and GTA Online will be released as upgraded, native PS5 and Xbox Series X/S versions on March 15. After a delay last year, Rockstar has confirmed that the new-gen editions will arrive soon, ...