Typeset a grap file to PDF using the [me] macro package, saving the output to a file
grap {{path/to/input.grap}} | pic -T {{pdf}} | groff -{{me}} -T {{pdf}} > {{path/to/output.pdf}}
grap {{path/to/input.grap}} | pic -T {{pdf}} | groff -{{me}} -T {{pdf}} > {{path/to/output.pdf}}