Is it possible to get to GM island on the game World of Warcraft

Ofcourse!... Assuming you're a GM at Blizzard's HQ, or running a GM account on a Private Server. It was possible to get to GM island a long time ago: but since then Blizz have greatly increased their security with such built-in programs as "Warden". As far as I know, you can't get to GM island, as it's set up on another server unreachable by any means: Unless hacks ofcourse.