The first gold summon I've ever pulled is rhino. I didn't start using it a month later at which point I got lucky and got sage naruto, as a wind main, that's two RK chase, so the rhino KR works well. But before that, it wasn't what I was using at all.
The second gold summon I've got is the snake, I have never used that outside of arena to complete certain missions.
So no, it's a matter of luck. (that said, rhino is THE one I need sever since I've pulled sage naruto, so it's very nice)