 The libgraphicsmagick-devel package contain also:

 - The documentation for GraphicsMagick found in:

   /usr/share/doc/GraphicsMagick/www

 - GraphicsMagick PERL extension.
   To install this extension follow the instructions in:

   /usr/share/doc/GraphicsMagick/PerlMagick/README.txt

  The Void Linux Team
