When you open a terminal from the panel in gnome-session-fallback you get a new gnome-terminal window. My goal is to have every subsequent gnome-terminal open from the panel to open as a tab in the already open window if one exists or to create a new window if one doesn't exist.
I have tried the --tab notion found in the help pages but this just opens new windows. I have tried to also use --tab-with-profile=Default on the default profile. Both of these again just open new windows.
I am fully aware that I can create new tabs via keyboard shortcuts. I am not looking to use them at the moment.