Just to add another confirmation that Genesis 2 works well in Poser - I use Poser almost exclusively (I use DAZ Studio to create Poser companion files for products that don't have them, and to convert textures across UV sets), and I use Genesis 2 (male/female) almost exclusively (I still use Apollo Maximus and James occasionally). The only gripe I have is that geo-grafting don't work in Poser (be aware of this before buying products that use it).

tl;dr: Genesis works REALLY well in Poser, but not geo-grafting.