So the main content of this file is to optimize the game for smooth gameplay, unlike Rockstar's weird settings. You can download the file even if you are using a better GPU. I am sure you can use it as a draft. This is my first mod, hope you like it. (Please endorse it if you find this helpful.)
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It helps a lot if you are using a low-end system. I tried to set and be sure that every single option helped to performance and increase the in-game quality. You can change the settings as you like. Remember, sometimes there can be some weird bugs like Every setting changes to Ultra, etc. Hope you like it, enjoy the game Cowboah!