Many sites hosting these "rar" parts will force you to complete surveys or "verify" your identity, which are almost always scams designed to generate revenue for the site owner without ever giving you the actual file.
Similar "leaked" or "compressed" GTA V files have historically been used to bundle malware that can steal personal information or infect your PC. GAmeostrom ! GTA Vpart14rar
Why is my GTA V disk installation stuck at 4% on PS4? - Facebook Many sites hosting these "rar" parts will force
However, "GAmeostrom" is not an official Rockstar Games distributor. Files labeled like this often carry significant risks: GAmeostrom ! GTA Vpart14rar