They have tried to set themselves up as a de-facto place to go if you want to know about guilds intentions to move to a particular home world.
However, they seem to be run by a guild that has a personal interest in sabotaging guilds that may prove a threat to them.
We have posted our guild information with our intention of going to Gunnar's Hold, which surprisingly happens to be the same home world chosen by the guild that runs the forums.
For some reason the admin of that site does not want to answer, they keep editing our post and removing the number of users from it, presumably because we dwarf their attempted alliance of non related guilds for GW2.
Any veterans of GW knows our guild and that we have been around as a very large community for a very long time. As such we have a massive registered community on our forums, as I'm sure other big alliances such as LaZy have. It's called history

We have screenshots of the before and after edited guild announcement we posted on their site and an email from someone claiming to be one of their alliance leaders bleating about our size and asking if we would mind moving to another server because they are trying to build an alliance there.
Strangely, it is after we rebuffed their request we move that the post editing started.
Unfortunately not all forums act impartially. The GW2Guild.org site certainly does not. It's more like a dictatorship acting in it's own interests.
So I urge all guild/alliances to check their posts on that site regularly and if you have not already posted on there, think very carefully before you do.
Again, apologies if this is the wrong forum to post this in.
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Fair is fair, so ....
After I had enough and sent a flame email to the site, a moderator finally got back to me relaying what is a reasonable excuse/reason for them editing the posts.
So while the information is not accurate according to the original guild leaders post, it should be okay(ish).
Pity they chose not to inform posters when they edit the posts or publish their intent to do so globally for all posts :S