is it compatible with gamemaker studio ?
It doesn't directly save/load GameMaker files, but there are some conversion tools available for converting Tiled maps to GameMaker rooms. There is a discussion about adding support for GameMaker on the Tiled forums.
game maker hahahaha
Actually since recently the Tiled snapshots can export maps to GameMaker: Studio room files! https://github.com/bjorn/tiled/pull/1386