Tile layers above 0 cannot be read or edited server-side on a gmap. I've seen a few other people run into this problem and there were no solutions for it, so I can only assume it is a bug. Here are 2 other threads where people had similar problems:
http://forums.graalonline.com/forums...hp?t=134262805
http://forums.graalonline.com/forums...ad.php?t=76235
I am able to read and edit on tilelayer[0], but once I go to tilelayer[1] or above it just returns the tile index as 0 no matter what. Tile layers work fine on non-gmap levels, so it seems to only be a problem on gmaps, and only serverside.