The official GTA VI materials available for free include wallpapers, artwork, screenshots, and trailers

https://magic-wiki.win/index.php/GTA_VI_free_download_po_polsku:_fakty_o_pobieraniu_i_oficjalnej_premierze

The official GTA VI materials available for free include wallpapers, artwork, screenshots, and trailers, while gta vi free download for the full game is not confirmed.