Didn't know where to post this, but sadly as you have read, GM island is no longer in WoW.
Now I just wounder, where the HELL are the GM's going to stay? lol
If you don't believe me check a 2.4.0 WoW private server database information on it if you have 2.4.0 server. Or Check WoW map viewer, OR go into a Private Server and try worldporting there.