GS script takes in postscript file as input , Font logo is understood by baanwindows printer not GS script.
1) In order get the logo you need to stamp a pdf page with just a logo on the top with you report pdf . this is know as stamping. Theres are application which does this .. like command line pdf ( cpdf ) .. is an open source for non commercial use.
2) or you may use itext in java to created your own pdfs ( it there in baanboard)
3) 3rd party application like hidox , Nazdaq's products .. etc