You can find the details about joining right here.
Here is a point where you have to make a choice. You can register via Twitter, Facebook or you can do it the old fashioned way with your email address. Note: For simplicity you might consider making your nickname the same as your Strats name.
Once you have made your profile you need to select the platform “GTA V”.
Select your avatar here.
Confirm your selection.
You will be returned to a page that looks similar to this, press the “REQUEST INVITE”. (You are almost done )
Great job! Last step. Click this link and follow the steps to add your info to the Wiki.
Awesome, I’ll see you in game!