To join a friend’s game lobby in GTA 5 Online, you can follow these steps: Press the Escape button on your keyboard or the equivalent button on your console to open the menu. Navigate to the Friends section and select the friend you want to join. Click on Join Game Session to accept the invitation. If your friend is not currently playing, you can send them an invitation to join your game session by following these steps: Press the Escape button on your keyboard or the equivalent button on your console to open the menu. Navigate to the Friends section and select the friend you want to invite. Click on Invite to Game to send the invitation. If you want to create a private session for your friends only, you can do so by following these steps: Go to Story Mode. Press the Escape button on your keyboard or the equivalent button on your console to open the menu. Navigate to the Online section and select Play GTA Online. Choose one of the following options: Invite Only, Crew, Closed Crew, Closed Friends, or Solo Session.