Built in GC is one of the main benefits of Poser Pro.  So for a render with realism in mind, I would say yes.  If you want a certain style, then it depends.  The only time that GC will really be a negitive is if you've loaded a character with a shader developed before GC (I'll call those pre-GC shaders from now on) and you haven't corrected the shader out of laziness.  Or you like the overall looks of the old shader for some reason and everything else is GCed so then you'd have to tweak the old shader for anti-GC. 

 

WARK!

Thus Spoketh Winterclaw: a blog about a Winterclaw who speaks from time to time.

 

(using Poser Pro 2014 SR3, on 64 bit Win 7, poser units are inches.)