The official game is roughly 2.5GB , but these .7z archives are often "Lite" versions (sometimes as small as 300MB) that remove radio stations or high-resolution textures to save space.
Google Drive may not scan files larger than a certain size for viruses, and hosting or downloading copyrighted material can lead to account suspension. GTA San Andreas (Nougat) .7z - Google Drive
Searching for usually leads to community-hosted Google Drive links containing highly compressed (Lite) versions of the game modified to run on older Android versions like Android 7.0 (Nougat) . The official game is roughly 2