Well, I can access it from here, but in my home I cant.
Tried with Chrome 35 and 37, and with Iceweasel (Firefox) 29. I'm using Debian Jessie x64.
Chrome says "connecting..." for a while, then it stops loading and says the page can't be reached. Funnily enough, if I try to access gdnet from my phone in the same network, I can read the mobile version (I doubt the thing could handle the whole page), but logging in fails, I put my nick and password, and it returns me to the main page without getting logged in.
Its some sort of IP blacklisting or something?