I have a tutorial up in a thread on the Daz forums about converting V4's brow prop to Genesis using Daz Studio only. The procedure should be the same for G2F and G3F, but you'll need to do some more work for G3F as she has no V4 UV. Unfortunately I can't link it atm since their forums are down. I'll link it up once they're back up and running.

-----sig-----
Daz, Blender, Affinity, Substance, Unity, Python, C#