I haven't specifically gone out JUST goose hunting with mine, but have/will take shots when given the opportunity. DEFINITELY use broadheads!
One time I tried stalking up on some ponds to shoot the ducks that were there, but didn't work out. On my way back to the Jeep, I ran in to the game warden. He looked at me and my longbow and said, "Are you trying to duck hunt with a bow?!?" I said, "Yessir, I surely am." He just laughed and said, "Good luck!" He never asked to see my license, duck stamp or anything! Cracked me up!