Honestly I can't tell my boys from girl apart other than my female has the gray like honky and my males don't. That and they are banded so I can tell who is who. Lol maybe he should of been called mystery. Actually now that I think of it honky might be a female, as its usually the females that...
My goose still has the gray in her feathers too. Even now going through her final molt into adult hood her feather colors haven't gone away. What's different is he has spots on his head which mine doesn't. But like Amiga suggested he might be crossed with something, you never know. I didn't...