Doesn't seem like you have much choice then but to find him a home or have him for dinner. I had to rehome 2 drakes this year as much as I hated it but it was necessary for harmony in the flock.
Maybe your goose will partner up with the other goose, meaning when i just had my Embden gander he was hatched here by a Muscovy duck well they were in separable for over 5 yrs i brought in a young 4 month old feamle goose he wanted no part of her until i separated him for his mama/mate and then he began to get a little interested in the goose but it wasn't until mating season that the relationship was really sealed. so it does take time but it can happen. I did put a piece of plastic fencing between them at night because she was scared of him and would jump out of the stall I kept them in and I was afraid she would injure herself.
Well that should work out in time too, just give them time and patience. 2 females can live together happily.
