In Gnome environment, the Terminator icon is in "System" menu. The
gnome-terminal is in "Utilities" menu.

I think it would be nice to have them in the same section. I think
Utilities is better (that's why I fill this bug report against
Terminator and not against Gnome-terminal).

However, it seems that Freedesktop pushes in the other way
(http://standards.freedesktop.org/menu-spec/latest/apas02.html):
The Additional section "TerminalEmulator" should be considered as
included in section "System". It's suggested and not mandatory.