geneweb-gui software package provides graphical user interface to Geneweb genealogy software, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install geneweb-gui
geneweb-gui is installed in your system.
Make ensure the geneweb-gui package were installed using the commands given below,
$ sudo dpkg-query -l | grep geneweb-gui *
You will get with geneweb-gui package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Miscellaneous |
| Package | geneweb-gui |
| Version | 6.08+git20160228+dfsg-2 |
| Description | graphical user interface to Geneweb genealogy software |
| Sub Section | Miscellaneous |