Over time I've found I'm using G2F more and more, I've found the newer skin mat presets give better and better renders compared to my older presets. So I've found I use the old ones less and less and for the ones I really like its worth the time to convert over to duf, which is simpler than it seems.

To use the V4 mats on G2F you will need the V4 UV's for G2F

Victoria 4 for Genesis 2 Female - Gives you the V4 UVs for G2F and lets you use your V4 outfits with G2F(DAZ STORE)The process to convert your dsa files to duf is quite simple ie

CONVERT DSA TO DUF

*Load .dsa on figure, select all the Surfaces and Save out as new Material.Now its possible to use the new .duf on any figure. *

Of course if you have a huge library of V4/V5 mats you may want to look at something like:

V4 Skins Auto Converter for Genesis 2 Female(s) - Auto converts dsa to duf  (DAZ STORE)

And remember just because you use G2F ocassionally it doesn't mean you need to abandon Genesis or V4 for that matter. All I can say is give it a go and I'm sure you won't be disapointed and if you are well your other characters are still only a click away.