On Guild event evenings, make sure you join the Honourforever crewCREW
our steam community is here: steam

To create a private game for the guild to enter, go into single player mode.
Press escape and go to the bottom option play GTA online.
Then select create private game from the options.

Once the game is created you will then need to invite members from your crew / friends that are online.

It makes it easier to all send each other friends request prior to the event.

Press Home key when in game to check for invites from friends/crew members.