Your gosling sounds like a male.
Don't get mad about this, it's just a suggestion... can the people you bought the gosling from take it back? Or is there someone else you can sell it to that already has some geese?
I think that this situation is not going to turn out positively, with the gosling...
A lot of people on here will be upset about you having only one gosling. They will say it's not natural for a goose to bond with chickens, just prepare yourself.
My advice is if you are going to keep just one gosling to get a mirror. A mirror big enough it will think that there is another...