Acidspunk, This does not look like any issue regarding the package, but simply an issue of not executing the command in the right directory. Dpkg is just saying it cannot find gngeo-gui_0.0.1-1_armel.deb. So make sure you are in the same directory where gngeo-gui_0.0.1-1_armel.deb is placed (via "cd") and then executed the command again. Please let me know if it helped, and if not, upload the exact commands you gave and the errors you encounter.
Unpacking gngeo-gui (from gngeo-gui_0.0.1-1_armel.deb) ... dpkg: dependency problems prevent configuration of gngeo-gui: gngeo-gui depends on python-pyside.qtgui; however: Package python-pyside.qtgui is not installed. gngeo-gui depends on python-pyside.qtcore; however: Package python-pyside.qtcore is not installed. dpkg: error processing gngeo-gui (--install): dependency problems - leaving unconfigured