GDM 3.30.3 / 3.32.0 Beta 2 Description:
GDM Thereís not much to say about a login manager, because it runs at boot time and you interact with it maybe a few times a day, when you login and when you lock your screen. But itís there, it protects your computer from intruders or pesky people. In addition, the login manager usually allows a Linux user to switch between different desktop environment that are installed in the respective operating system. It also lets you to quickly login as a different user, use a guest account or the remote login function.