Forum Integration:
Create a category in Kunena where you want to store user groups. Copy the category ID and paste it in GroupJives forum integration. Enable forum integration then create a group. On the same menu as Group Bulletins, Group Members, Return to Group, there will now be Group Forums.
The Kunena category can be unpublished or limited to admins only if you like (please test before pushing to live environment!).
Again, existing groups can not be integrated right now, I have not added that functionality yet.