[Fedora-directory-users] Map FDS group to Posix group

Colleagues! There is deployed server FDS. In the catalogue there are users and groups. At users properties of the Posix-user are included and accordingly established uid and gid. But specified gid have no attitude to groups to which the user in FDS belongs. It is the extremely inconvenient. Whether it is possible to map with groups FDS to groups UNIX/POSIX somehow? Thanks