profile assigned to device group
The simplest approach is to drag a spare device you have in hand to the group of interest, and check on the web-console all the profiles, rules and advanced configurations that are deployed onto the device . This of course might not work 100% perfectly if some of the profiles have advanced filter options (such as based on device brand, model, etc.) enabled and your spare device does not fulfill the filter criterion.
This is arguably somewhat of a gap. You can't really inspect a Group and see what Profiles are assigned to it. You can go to the Profiles themselves and see what Groups they're assigned to, or you can inspect a device that is a member of a Group to see what Profiles it has assigned, but that scenario doesn't account for other Profiles that might be assigned to the group but don't apply to a particular device because of some Filter Criteria.