I have done this with the Creator ToyBox - https://www.renderosity.com/mod/bcs/creators-toybox/116432 - (without this tool I hade no tongue in the figures) But who knows if this will work in Poser 12. And you have no HD morphs. And you must convert all the cloth also.

G3 and G8 is not possible to convert into nativ figures. In between I can also use this G8 figures in poser with DSON. All my work is based on this G2 - G8 figures.

I realy don't understand why poser can't make an import tool for poser 12 also. For Blender there is also an import tool for the DAZ figures. Even for G8. I think poser just want to sell their own bad figures to the people who are dependent on poser. M4 is better then l'homme. It's a bad game. I don't trust in this managment anymore.

I will keep poser 11.2 and move to blender and DAZ. DAZ is so much better inbetween then poser. What I miss in DAZ is a shader mixer like in Poser. And DAZ has no real volume scattering... So I see my future in Blender.