Use a systemd sandbox for the gpm service
    
    The sandbox is designed to allow standard select&paste operation on
    the text console. More fancy uses of gpm are unlikely to work, but
    that's on purpose: the only thing that people should be using gpm for
    is the occasional text copying when they land in rescue mode.
    
    This serves as an alternative to [1]. The replacement policy is probably
    stricter in some regards, while less strict in others… But I think it's
    much less magic and should be easier to maintain.
    
    [1] https://src.fedoraproject.org/rpms/gpm/pull-request/4