How old is your goose? Grown, and fully feathered out, or still a gosling? This time of year, I assume grown.
First, remember it is wearing a nice warm "goose down coat".
So it has basic protection from the weather. A wind break or a place to get in out of the wind, rain, etc helps. Dry straw or hay for a bed. If it gets real cold, they will sit down and pull their feet up into their feathers to keep their feet warm.
Water - liquid water - is the main thing. If the temperatures drop below freezing, then the ice needs to be broke out of the waterer and replaced with water several times a day.
Is it a domestic goose or a canada goose? Domestic geese do not migrate and most do not fly much or at all. It is the canada and other "wild" type geese that migrate.
If possible, a goose buddy would be a good thing, but like mentioned, not necessary.