Hi,
is your goose on her own eggs or those of the chickens?
If she is on the chickens eggs go armed with a broom or a board and push her out. Work it so that the chickens are let out later in the day, eggs collected, then let goosey lucy out.
If ther are her eggs then what are the options for three weeks of chickens moving out?
Why is the goose not laying in her own house?
Sorry for the oudles of questions. Supply with some more info and we will come up with some suggestions