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

https://source-wiki.win/index.php/GTA_VI_for_free_a_Vice_City_i_stan_Leonida:_co_ju%C5%BC_ujawniono%3F_31346

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.