How to iconify gnome-panel?

I have execute below command in FvwmConsole, but didn’t work.

All (gnome-panel) iconify true

Yeah, that won’t work because fvwm recognizes it as a dock or whatever. However, you can move the panel if you would like… All (gnome-panel) Move

I have some fvwm functions that fly windows off the screen, and then fly back into the screen again. Maybe you could make use of those.