You can try:
http:\\
www.aritah.com GT's backdoor
-or-
209.120.209.15 paste the direct IP into your browser's URL box...
or even just drop the "www" and try glocktalk.com
http:\\glocktalk.com was working for me for a few minutes, then it failed to as did the aritah.com backdoor, and the direct IP.
I think they're having server/provider/DNS problems.
At least I know I'm not being filtered.
Since multiple people are having the issue, flushing your DNS probably won't help, but it can't hurt either. (Flushing your DNS is suggested if a site changes it's IP address, and local copies of the "DNS phonebook" are out of date, forcing you to resolve the new IP from potentialy better data out on the Internet...)
Assuming you've got Microsquash Winders of some variety made this century, open a command prompt window, and type in
"ipconfig /flushdns" That will clear your local table and force your PC to get the latest DNS info for wherever you're going from an outside DNS server.
The local DNS table will rebuild itself as you go places.
You can also try
"ipconfig /registerdns" that will force your PC to renew it's IP address and re-register with the DNS server. But again, since so many people are having the issue with GT right now, it probably won't help...