You can see in the sticky that the GTKRadiant is only for Linux 32-/64-Bit Systems.
Here is the Link to the GTKRadiant Homepage with the GTKRadiant Link for the GTKRadiant for Windows (Vista included)
http://qeradiant.com/cgi-bin/trac.cgi (http://qeradiant.com/cgi-bin/trac.cgi)
And here is the direct download link for the GTKRadiant-Installer for Windows
http://zerowing.idsoftware.com/files/radiant/GtkRadiant-1.5.0.msi (http://zerowing.idsoftware.com/files/radiant/GtkRadiant-1.5.0.msi)
And this is NO NONSENSE Lava Croft!!!
it's not non-sense, it's only that it will be replaced by link-spam in a few days
It is nonsense, since the download link to GtkRadiant can be found on the frontpage. The links posted in the sticky here are for Ingar's Radiant SVN builds. If you monkeys need a thread like this to find a download link for GtkRadiant, I suggest you rather just give up right now.
A sidenote: Recreating a locked thread is not smart.