sudo apt remove gnome-*
will remove all packages that does match that,
also the ones that were install prior to your "mishap".
Now, what follows has not been tried, beware ;-)
- Do
$ dpkg --list | grep -E "^ii[[:space:]]+gnome" | tr -s ' ' | cut -d' ' -f2 | sed -re "s/^/sudo apt uninstall /" > filename
then remove the lines below from that file (to keep them)... [ created on my 20.04 ubuntu ]
- save the file, exit the editor
- do
source filename
from a terminal.
gnome-accessibility-themes
gnome-bluetooth
gnome-calculator
gnome-calendar
gnome-characters
gnome-clocks
gnome-control-center
gnome-control-center-data
gnome-control-center-faces
gnome-desktop3-data
gnome-disk-utility
gnome-font-viewer
gnome-getting-started-docs
gnome-initial-setup
gnome-keyring
gnome-keyring-pkcs11:amd64
gnome-logs
gnome-mahjongg
gnome-menus
gnome-mines
gnome-online-accounts
gnome-power-manager
gnome-screenshot
gnome-session-bin
gnome-session-canberra
gnome-session-common
gnome-settings-daemon
gnome-settings-daemon-common
gnome-shell
gnome-shell-common
gnome-shell-extension-appindicator
gnome-shell-extension-desktop-icons
gnome-shell-extension-prefs
gnome-shell-extension-ubuntu-dock
gnome-shell-extensions
gnome-startup-applications
gnome-sudoku
gnome-system-monitor
gnome-terminal
gnome-terminal-data
gnome-themes-extra:amd64
gnome-themes-extra-data
gnome-todo
gnome-todo-common
gnome-tweaks
gnome-user-docs
gnome-video-effects