Communitybuilder no, it's not possible at this time.
There are two technical reasons for that. First, it's not a real group, just virtual, so the relationship wouldn't return anything. And second the extension was implemented without pagination, so it would be inadvisable to list a group with more than hundreds of members for performance reasons.
If pagination is added later on for large groups, then listing members could be added without too many risks.
Unless you've got a small closed community, I don't think it would make much sense to use this extension to list all members. An extension like User Directory makes more sense and provides filters and search.
