If you want the real Los Santos experience with high-definition graphics, GTA Online access, and the full story mode, you should download the official PC version. You can find it on these legitimate platforms:
Here is everything you need to know about why GTA V "APKs" don't exist for PC and how you can actually play the game safely. The Technical Reality: APK vs. EXE download gta v apk for pc
You install the emulator, sign in to the Google Play Store, and download your mobile games there. If you want the real Los Santos experience
Attempting to "download an APK for PC" usually leads to one of two things: a file that won't open, or a malicious program disguised as a game installer. Why You Should Avoid "GTA V APK" Sites GTA Online access