/usr/share/doc/graphviz/pdf/gv2gxl.1.pdf.gz is in graphviz-doc 2.40.1-2.
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It is a symlink to /usr/share/doc/graphviz/pdf/gxl2gv.1.pdf.gz
/usr/share/doc/graphviz/pdf/gxl2gv.1.pdf.gz