Where Genesis is concerned building clothing around a morphed shape is foolish to say the least, it has to be made to fit the gray golem otherwise you end up with crumple zones that wont go away.

As far as MD goes, load Genesis into a clean scene in DS and export it as OBJ, that will be your avatar in MD, build and drape your clothing around it.

You then export the clothing as OBJ and use the Transfer Utility on that in DS to rig it for Genesis, once rigged and conformed to Genesis you save it using "File > Save as > Support Asset > Figure/Prop Asset".

The other Genesis shapes are morphs, which means you need to create morphs in the clothing to get it to fit to those shapes.