Gameguard question

I figured you guys at /vg/ would know if gameguard builds up a new connection to a server which runs the whole time the game runs.
Specifically I want to know if I have a gameguarded mmo and I want to write a custom client in how far would I have to concern that it's using game guard?

what the fuck is game guard?

google that shit and answer my question instead of counter-asking
http://eng.nprotect.co.kr/nprotect_gameguard.htm

not clicking that.