Max2MDL exporter are avaible in the Download Section on the GS Main page...

Here the Link

Code:
http://download.conitec.net/max6tomdl.zip


cYa Sebastian

Tutorials:
[Blender]Terrain creation ENG/GER
[Blender]Low Poly Tree Modeling
[GIMP]Create a Texture for Terrains
CLICK HERE