$group.AvatarUrl - string - URL to the group's avatar.
$group.DateCreated - DateTime - Date the group was created.
$group.GroupPath - string - Path to group from site root.
$group.Name - string - Name of the group.
$group.ParentGroup - Group - Parent group.
$group.SubGroups - Group Collection - List of subgroups.
$group.Tags - string Array - Tags for the group.
$group.TotalMembers - int - Number of members in the group.