Emacs menu accelerators — emacs

Jeffery B. Rancier’s March 12 post on [email protected] has
this useful LISP snippet for Windows Emacs users:

(defun jbr-w32-simulate-Alt-tap ()

(interactive) (w32-send-sys-command 61696)) (global-set-key [C-tab] 'jbr-w32-simulate-Alt-tap)

I wonder if there’s a similar way to do that under GTK…