Definitely going to need a picture. But I think Al's comment was actually appropriate in this case. I don't keep up with ALL the names, but I've never head of the gumball monster. And when I googled it to try to get a picture, this thread was the only thing that came up.
Unless someone confused the name and you have a bubble gum monster chalice? If so, the BGM has a little more blue in the flesh and the eyes are a little more pink. Although those colorations can definitely vary from tank to tank.