Goose signs?...goose game?...the mind boggles.
I'm pretty sure it didn't exist when I walked the CF in 2012!
That's because the Templars invented it but hid their concept so cleverly that everybody thought for centuries it was a traditional board game that became popular in Europe around the 15th to 16th century and spread from Italy to France and Germany and Spain and the rest. Some people figured out the real truth and revealed the game's hidden Camino connection only in the last few decades or so. Finally!
However, as a look around among the offer on the various Amazon sites shows, the Camino Game of the Goose is still a rarity and largely unknown, especially on Amazon.com. On Amazon.co.uk, Amazon.fr, Amazon.es and Amazon.de you find a number of varieties of the Game of the Goose, Jeu de l'Oie, Juego de la Oca and Gänsespiel; some are quite pretty with small wooden geese as game pieces and not cardboard pilgrims.
Goethe wrote a poem: "Life is a Goose Game" (Das Leben ist ein Gänsespiel).