DS Game Maker definetly isn't compatible with Game Maker for PC. Just think about the practicalities - room sizes, sprite sizes, they all have to be mathematical numbers on the DS, e.g. 32, 64, 18, 192, 256.
Also there is no way either me or Robert Dixon could begin to read the bloated GMK files. They have so much DRM and protection.
However, try the DS Game Maker at
www.dsgamemaker.com . Whilst it still can't load GM6/GMK files, it does support sprites, backgrounds, sounds, rooms and actions, so give a go to recreating the game by hand. It's much more fun.
- James