Don't you sometimes see when you are trying to apply for a group/squad in-game using /gapps that sometimes there is a message in red saying "Applications for this group is closed"
Today I'll teach you how can you Close/Open applications for your own group/squad!
1- Press F6
2- Press on "Group Applications"
3- Press on "Manage Applications". You must have access!
4- Click on "Close group applications" if it Opened, and "Open group applications" if it is closed.
For the squads, it is the same! But instead of the word "Group", it's "Squad"!
Hope I helped! Thanks.