GTA VI has been officially described as a paid release

https://branched-ocelot-e00.notion.site/Verified-details-show-gta-vi-free-download-is-not-available-for-the-full-game-39f3ca2daf878065b569d51be7659ba1

GTA VI has been officially described as a paid release, so any gta vi free download claim for the full game would not match the verified Rockstar sources.