GPM

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

General Purpose Macro-generator
GPM

   <language> (GPM) An early text-processing language similar to
   {TRAC}, implemented on the {Atlas 2} by {Christopher
   Strachey}.

   ["A General Purpose Macrogenerator", C. Strachey, Computer J
   8(3):225-241, Oct 1965].

   (2006-07-21)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

GPM
       Gesellschaft fuer ProjektManagement [e.v.] (org.)