Now for Poser? I don't know if Poser has anything similar, but you can at least use D|S to get the G2F figure fleshed-out and clothed, then export to Poser to do what you will after that.

Poser does - copy morphs from.  What is truly great about it is that you no longer need to have ANY character morphs in the clothing.  You can load a figure, apply a character, turn that dial-spin into a single FBM (via dials to single morph) then use copy morphs from to inject the resulting FBM into the clothing.  Viola!  Even better, once you do that, you can go and delete all of those now unneeded morphs to make a smaller figure.  I am able to take a fully loaded V4 (292MB figure) and reduce it to 22MB.  Not important if one is doing NVIATWAS renders, but for storyboarding multiple figures in a scene, it is almost mandatory.