Sorry I didn't notice you were referring to a natural finish GB200. The only finish I'm aware of is the Brown Sunburst. I haven't seen or heard of such a thing as a natural GB200, but I wouldn't completely rule out the possibility one could have been produced.
As you mention, it's also possible the guitar you're referring to is a fake. Is this something that you own? Or are you seeing it for sale? If you can share some pics we might be able to assess it better.
I think it must be a fake/copy. Some of the details look right (the inlays on the neck and the bridge, the label) but there are just as many or more things that don't look right (the shape of the cutaway/horn, 1-piece neck instead of 3-piece, the tailpiece, the saddle, the truss rod cover shape, the knobs). Not to mention that the price seems WAY too cheap.
On the other hand, I wonder why someone would make a copy of a model/finish that never existed? But maybe that's giving too much credit to a criminal.
I definitely wouldn't buy it as any kind of investment as I think you'd have a hard time convincing any other buyer that it's legit. The only way I'd buy it is if I could play it and it sounded and played great — just because it's (probably) a fake doesn't mean it can't also be a good guitar.