It sounds like you're looking for a free, portable version of a fan-made or modded game concept called "GTA: Namaste America" — likely a parody or themed modification of Grand Theft Auto set in an Indian/American context.
Stability Issues: Fan mods like Namaste America (which changes textures, cars, and music to an Indian theme) are often buggy and may crash frequently on modern versions of Windows. How to play safely gta namaste america game setup free portable
Cons:
Thus, any website offering a download for "GTA Namaste America" is almost certainly fraudulent. It is a bait-and-click tactic designed to lure users searching for free, culturally hybrid games. It sounds like you're looking for a free,
Cultural Reskinning: Characters may wear traditional or modern Indian clothing, and street textures might feature Hindi or regional language advertisements. Buy/Own GTA San Andreas v1
All these can be made "free portable" using the same folder-copy method described above.