sometimes folks read it and do not know themselves, so istead of guessing and possibly passing on wrong info they just let someone with possible experience answer.
I would be careful with what you set under a goose. Geese weigh a LOT more than chickens and ducks, and their eggs are usually VERY sturdy with VERY thick shells.
Also, goose eggs set for nearly double the time of chickens eggs.
I would think maybe that the peeping and movement of the babies would get her off the broodiness thing...but then again if she steps on the eggs at all, they will be crushed by her weight.
Let us know what you decide, and tell us how it goes!
Personally, I would buy another incubator AND set a handful under the goose just to see how it went before I decided to experiment with a larger amount of eggs.