There is a new GTAV Multiplayer Mod after Rockstar shut down the other mod GTA:MP. That are really good news, because it is really annoying when you get f***ed up by cheaters or hackers in GTA Online.
GTAV Mutliplayer without Cheaters and Hackers
With this mod cheaters and hackers are history. When you host a dedicated server you have the control who can stay or have to leave. To browse through other servers the modding team included a server browser what let you connect to displayed servers or via IP adress and Port.
Custom Games Modes
If you’re tired of the free mode they’ve included a couple of game modes.