XDA Developers on MSN

This mod squashes GTA 5 down to a measly 2.5 GB file size

But don't expect it to be any fun.
Amazon S3 on MSN

Playing as Thanos in GTA 5 (mods)

Gaming with Kev takes control of Thanos in GTA 5 and unleashes total chaos across the city with the Infinity Gauntlet.

Team behind GTA 5 multiplayer mod that rivalled Rockstar-owned FiveM says Take-Two is shutting the project down

Support for Alt:V will end by early July ...
Gameranx

A Modder Managed To Shrink GTA V To 2.29 GB – But Reduce Your Expectations

A modder named OptiJuegos managed to shrink GTA V down to 2.4 GB - but he stripped out most of the game to do so.
Gameranx

Take-Two Has Sent A Takedown Notice To GTA V & FiveM Alternative Alt:V

…Rockstar Games and Take-Two Interactive have made it clear that FiveM is the only authorized platform for GTA V multiplayer modding, as defined in their Platform License Agreement (PLA). In ...