That's a piece of work by famous photographer/artist Sally Mann, here are some more pictures.
I've seen a GP800 taken apart, and I can certainly attest that that has an underbone frame. This great big Aprilia is almost certainly built on the same frame, or very nearly the same frame, as the GP800.
When you have a step-through design and twist-and-go driving, it's undeniably a scooter in my books.
Just for calibration, where on that whole motorcycle/scooter continuum would you put a Suzuki SW-1?
I don't have any, but I did a little digging around. The best I could find of No.6 was ~500pixels tall.
There are a few others online at better resolution. Hope this helps.
StegaVorto, a completely unrelated project that makes use of dynamic images from search queries, uses Picsearch. I'm not sure how their rate-limiting compares, but it might be a possibility.