Source : Free On-Line Dictionary of Computing

GT/SQL
     
         An {SQL} {pre-processor} from {Greystone Technologies}
        which combines {MUMPS} code with {SQL} code and generates code
        that can work with a {database} from both the MUMPS and SQL
        perspectives.  This is often done when a database is to be
        made available in a {client/server} environment, where the
        MUMPS database serves one or more SQL {client}s.
     
        (1995-01-10)