Every desktop application should have a .desktop file
Every desktop application should have a .desktop file, as described in http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html. Ideally, you'd also include an icon, but that is up to you. Talking about the icon, the logo is said to be copyrighted. Is it still distributed by the terms of the GPL?
This could be a simple totalopenstation.desktop:
[Desktop Entry] Name=Totalopenstation Comment=Download and process data from total station devices Exec=totalopenstation-gui Icon=totalopenstation Terminal=false Type=Application Categories=Utility;Education;Science;Geoscience;Geography;
You can always validate spec files with desktop-file-validate.
Submitted by Volker Fröhlich.