Determine which version of GNOME is running
You can determine the version of GNOME that is running on your system by going to the About panel in Settings.
Open the Activities overview and start typing System.
Select Settings ▸ System from the results. This will open the System panel.
Select About to open the panel.
Select System Details.
A window appears showing information about your system, including your distribution’s name and the GNOME version.