Trying to share a GTK application window with https://meet.google.com/ might not work if you run under a Wayland session.
A workaround is to run a GTK application under XWayland:
gedit can be shared within google meet.
If you want to share a
gnome-terminal window, things are a bit more complicated.
gnome-terminal has a client/server architecture so
gnome-terminal-server needs to run with the
mkdir -p ~/.config/systemd/user/gnome-terminal-server.service.d/ cat <<EOF > ~/.config/systemd/user/gnome-terminal-server.service.d/override.conf [Service] Environment=GDK_BACKEND=x11 EOF systemctl --user daemon-reload systemctl --user restart gnome-terminal-server
The last command will kill all your terminals!
Now you can share your
gnome-terminal windows again!