I have never been a fan of the HGEC GUTZ body, but I do find it appropriate in one case. I would like to use it for the Orc body, while using the regular one for the other rest.

Is there a way to use Gutz for just the Orc race only?

No. Do a search next time, this question has been asked far too many times to count. Oblivion just doesn't have that functionallity. Blame the people at Bethsoft who didn't feel like making clothing meshes use morphs (which is probably a good thing since it would make new meshes even harder), or making more than one body type.