If you use sbuild to build your package and your gxml .deb files are in /home/jeremy/build-area/ , you could run this command to use those dependencies while building your package:
sbuild --extra-package=/home/jeremy/build-area You don't have to wait until a dependency is fully accepted into Debian to upload other packages that will use that dependency. Ideally, that package would be uploaded to experimental and only get uploaded to unstable once its dependencies are available in unstable. Thank you, Jeremy Bícha

