Fowlmoma, I know that with chickens you can swap chicks for eggs while the hen is not looking. But I don't think that is a good idea for a goose that may have sat so tight to the nest that she suffocated her goslings. If you feel the eggs are dead, it might be best to do put her with the other geese for comfort and block her access to the nest. Or you could set up a temporary pen away from the nest and put the gosling with just her for supervised interaction and see if she will go from broody to momma mode. But I have never had a broody goose, mine are still babies, soI could be completely wrong. Do what you think is best or wait for someone with more experience to give you better advice.