I was the one who suggested this to them, looks like quite a few people came to the site because of it. As you guys may not know, I am a news poster on
http://grandtheft5.ucoz.com/ and I ran this story (with Matt editing and approving it) as someone else on these forums brought it to my attention. I looked around on the internet for related information and it would seem that many other forums/websites were discussing GTANet's closure as a rumour of possible Grand Theft Auto V information coming soon.
Of course Waddy's post pretty much puts this rumour to rest.