PDFBox does not seem to depend on anything but the JDK (1.6) and commons-logging, so it might work if you manage to find a working and matching version of commo

PDFBox does not seem to depend on anything but the JDK (1.6) and commons-logging, so it might work if you manage to find a working and matching version of commons-logging for GWT, and if PDFBox only uses the JDK parts supported by GWT. That is a pretty big if though. I doubt someone bothered to port this to GWT, but who knows, you may be in luck. If you are trying to generate PDFs in a web-application, I would delegate this task to the back-end.