Session

Gnome UI

Gnome desktop

sudo apt install -y ubuntu-gnome-desktop xrdp

Tasksel

sudo apt install -y tasksel

GDM3

sudo apt install -y --no-install-recommends gnome-core

sudo apt install -y gdm3
sudo dpkg-reconfigure gdm3

sudo reboot now

gnome-session-quit

Logout immediately

gnome-session-quit --no-prompt