The full GTA V source code has been leaked The leak contains GTA V source code and stuff from Bully 2 and GTA VI Leaked in a discord server by a random British guy in the 360 modding community known to get sued by Rockstar multiple times
"Now i am expecting a open source version of gta to arrive soon on linux natively . Tired of playing supertuxcart."
Here is the source. Another one.
As a release engineer for Electronic Arts for 13 years, this looks like to me a copy of either the source folder from Perforce, a devs machine that had synced a stream, or the same from a build machine. It's not uncommon to use batch files and python scripts to reconfigure a workspace to switch workspaces. I see a solution file in there.
I would bet that particular file is an automation script to configure a machine for development.
interesting, that's actually a reasonable theory