I wonder about the legal aspects. In my opinion, when you create a ready-to-print version, you have to attach the text of GFDL license to it - directly, not as a link. Like it is done in http://en.wikibooks.org/wiki/Image:LaTeX.pdf.
Secondly, current version of the tool does a plagiarism - beacause it does not mention image authors and does not provide any mean (like by making images clickable) to check these authors. It could generate a list of images with their licenses (as images can have different licenses, not only CC & GFDL, but also FAL), like on page 213 of http://pl.wikibooks.org/wiki/Grafika:C.pdf.