Description of problem:
If you use the --geometry option with gnome-terminal, you will get a warning.  And yet,

$  gnome-terminal --help
Usage:
  gnome-terminal [OPTION...]

...

Window options; if used before the first --window or --tab argument, sets the default for all windows:
  --show-menubar                  Turn on the menubar
  --hide-menubar                  Turn off the menubar
  --maximize                      Maximize the window
  --full-screen                   Full-screen the window
  --geometry=GEOMETRY             Set the window size; for example: 80x24, or 80x24+200+200 (COLSxROWS+X+Y)
  --role=ROLE                     Set the window role
  --active                        Set the last specified tab as the active one in its window

...

Please update the help.  I wonder if there are other broken options.