If it has been 3 days since your last login and/or 5 days since your last post, then 1 of 2 things can happen to you.
For GMs that we know have been active before and have a certain amount of posts that Administration feels is suffice, you will get a warning.
Of course, if you have posted in the Absence/Vacation forum, this does not apply unless the Admins decide it does.
But for those that do not have many posts and are relatively new, you will be removed from the GM position of your team.