yes the gamespace export directly to mdl7 but not in multitexturing, I export by parts and load every part with
the merge option in med for use diferent textures for every part

In gamespace you select the object and export usinng save object as and there is the gamestudio A6 format
Gamespace 1.6

I now use Truespace7 with the game export plug in
You can download a reduced version of gamespace and see how is work.