Transfer Active Morphs is mainly for legacy figures - in effect it's on permanently with TriAx figures such as G2F and is what provides the first approximation fit. Be aware that using the Smoothing Modifier can be problematic in at least a couple of respects - it isn't supported by the DSON Importer for Poser, and it will (depending on settings) tend to wash out the effect of any morphs you want to apply. What you can do is fit the item to the morphed G2F, apply a smoothing modifier if that helps, hide G2F so only the clothing is displayed, export as OBJ and use that as the starting point for a custom morph. However, look at your model in one of the wireframe modes to make sure the pokethrough isn't due to a lack of resolution, or resolution in the wrong place, in the clothing - if it is, morphing and smoothing aren't going to help and you may need to modify the mesh (if you run into this with a more complex model, where you've edited the weights and then find you need to tweak the mesh, remember that you can use the clothes with the tweaked weights and the base mesh as the Source in Transfer Utility and the modified mesh as the target so that you don't start from scratch again).