Toggling the same key combination between two options

[etay . meiri]

Hi,

I have F8 and F9 mapped to gud-remove and gud-break (respectively) in
gud-mode.
I'd like to mimic the behaviour of Visual Studio where F9 toggles
between setting and removing the breakpoint. Is it possible to
configure emacs so that it will toggle between the two bindings every
time the key is pressed?

Thanks a lot,

-Etay