
John the translator has been the connector between the non-Korean scene and GSL for a while now, and is now posting a thread explaining a few things that made some people believe they rig the maps.

John explains that the maps were in no way rigged, but randomly picked, and he actually spent 20 minutes making a box to put the pieces of paper with the names of the maps on them.
One other thing people have asked the GOMTV staff is why they haven't used custom made maps, and the reason for that is for people without a team to be able to practice maps on the ladder, and frankly John don't think Blizzard would've approved it.

Links
GOMTV.net - Source