Where did you hear the phrase "gold blush normal?" If it's a normal, in terms of discreet genes, it's just a normal. "Gold blush" sounds like a descriptive term that someone made up to describe a normal (non-morph) ball python that looks pretty, but doesn't carry any mutation genes and whose appearance most likely can't be duplicated all that easily. (And by adding the "normal" part to the name, it seems they weren't really trying to pull one over on anyone ...)

Now, it IS possible that, by breeding a high-gold normal animal to various morphs such as pastel, you can selectively breed for lighter, brighter, nicer-looking morphs ... There is still a lot to be done with the careful selection of non-morph ball pythons, IMO.