Create a "bin" folder in the Grand Theft Auto V game directory
Unzip the multiplayer files there.
Multiplayer is launched via "fivemx".
Press “Cek”, select the desired server and click “Join”.
The game starts, log in under the Social Club login, then select the story mode. After loading, press the "F6" key and you will be connected to the server.
To exit the game, minimize it by alt+tab and in the FiveM Client menu click the "Close" button.