git-gui software package provides fast, scalable, distributed revision control system (GUI), 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 git-gui
git-gui is installed in your system.
Make ensure the git-gui package were installed using the commands given below,
$ sudo dpkg-query -l | grep git-gui *
You will get with git-gui package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Version Control Systems |
| Package | git-gui |
| Version | 1:2.10.2-2 |
| Description | fast, scalable, distributed revision control system (GUI) |
| Sub Section | vcs |