The link seems fine to me, but the best way of accessing IRC is mIRC (
http://mirc.com). There's plenty of guides around, and the people on the channel will no doubt be glad to help you out if they're not idling. Just type:
/server irc.gamesnet.com
/join #gfnetwork
Or, alternatively, Click Here (irc://irc.eu.gamesnet.net/gfnetwork) when you have mIRC installed.
Other similar channels include #monkey-island, #jediknight, #islandfort, #miswordclub, #pcgfans & #joeythefish