If you're still interested in a compressed version, you might find such files through torrent sites or file-sharing platforms.
Instead of searching for impossible compression sizes, you can optimize the official game to run on weaker hardware: Official Downloads: Use trusted platforms like the Epic Games Store Rockstar Games Launcher to ensure a safe, working copy. Graphics Mods: gta 5 highly compressed 1gb for pc
The pursuit of a "highly compressed 1GB" version of Grand Theft Auto V If you're still interested in a compressed version,