Yes, yes, French heritage, we still have parishes and other remnants of Gallic insanity, blah blah crapaudcakes.
It's not the intent that vexes--it may be slightly stupid, but no more so than most other signs people make (except for the clearly not stupid one we almost made for a Monday night Browns game a couple years ago: "kEn dorSey? Probably Not").
You know how "geaux" would be pronounced? Not like "go," chumps. French is very difficult, it's true. But, in French, a "G" followed by an "E" is always, always soft. Every time. It does not matter if the "E" is followed by an "A," a "Q," or a "7." What you need in this case is another "U:" "gueaux." (Cf. guerre, guère, gueule, etc.) Yes, it looks silly. But does it look sillier than "geaux?" No, it doesn't, and it has the added bonus of not being totally nonsensical.