They probably meant it's a yellow ghost. So, it's a hypo. It looks like a hypo in every photo to me--most of all in the first one, but I see it in the other two as well.

To make Fire hypos, you will need to breed it to the fire, hold back a Fire offspring, and breed that offspring to the Ghost again.

If your Ghost is a female, it's obviously going to take significantly less time to do that. You might theoretically accomplish it in 2 years, though 3 is more likely. If it's a male ghost going with a female fire, however, then it would probably take 4 years, at minimum.