GTA V has seen dozens of patches over the years. Version corresponds to a specific build of the game—usually the retail version following a major title update. Many modders remain on this version because it is stable, widely cracked (for single-player modding), and has broad mod compatibility.
For a reliable download, you can find various versions of this file on community sites like GTA5-Mods.com . gta 5 gameconfig 1.0.350.1 download
A gameconfig file, short for game configuration file, is a file that contains settings and parameters that configure the game's behavior, graphics, and performance. It's usually used to tweak the game's performance, resolution, graphics quality, and other settings. GTA V has seen dozens of patches over the years