I have been researching this in the forums and I believe this is possible.
What I want to do is have group types accessed via a DNN tab page and then have categories specific to the group type with a custom view similar to the groups page layout on AS but specific to the group type.
When a user adds a new group they are required to choose the group type and category or categories it belongs to.
Can a group belong to more than one category?
here is an example of the page layout
Fishing Page - Shows all groups belonging to Group Type = "Fishing"
Categories Associated to Group Type = "Fishing"
Clubs
Guides
Stores
Fly Tying
Camping Page Shows all groups belonging to Group Type = "Camping"
Categories Associated to Group Type = "Camping"
Clubs
Camp Grounds