geany-plugin-scope software package provides graphical GDB front-end for Geany, 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 geany-plugin-scope
geany-plugin-scope is installed in your system.
Make ensure the geany-plugin-scope package were installed using the commands given below,
$ sudo dpkg-query -l | grep geany-plugin-scope *
You will get with geany-plugin-scope package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Development |
| Package | geany-plugin-scope |
| Version | 1.28+dfsg-1 |
| Description | graphical GDB front-end for Geany |
| Sub Section | devel |