I’m gonna try to explain this as best I can (I don’t have Faceshop, so forgive me if my instructions are flawed.) Assuming the V4 face morph is saved out as an obj file, I believe you can save it as a PZ2 pose file (with morph applied.)
Open GenX, and load V4 as your source model.
Apply the PZ2 file you created as a “Pose”
On the GenX morph list, look for the Faceshop morph, whatever you named it, and make sure that the morph is set to “1”
Press the “Select” button, which allows you to select the morphs applied to V4 via the “Load Pose” based on different criteria (Choose “Transfer: On for All Non-Zero Values”)
Make sure the drop down next to the “Select” button is set to “Create Single Morph” and the drop down next to the “Transfer” button is set to “Victoria 4,” then press the Transfer Button.
Fill out the information in the Pop Up relative to your morph and save it. (I would suggest changing the location to Actor/Head)
I hope this helps.
PS: I’m sure you are aware of this, but if you don’t have V4/M4 classic shapes for Genesis, GenX won’t work for V4.