GVL

from The Free On-line Dictionary of Computing (8 July 2008)

GVL

   Graphical View Language.  A visual language for specifying
   interactive graphical output by T.C.N. Graham & J.R. Cordy,
   Queen's University, Canada.

   ["GVL: A Graphical, Functional Language for the Specification
   of Output in Programming Languages", J.R. Cordy &
   T.C.N. Graham, Proc IEEE Intl Conf on Comp Lang ICCL'90 (March
   1990)].