There.
With that off my chest I must say that I am really bummed by this news. GMP made what I consider to be one of the finest examples of a consumer level model that I've seen yet. I have several of its Mustangs and a couple P-40s and they are among the most-prized models in my collection. The fit/finish, metal content, working parts, packaging (some came with books) are first rate, and the models truly display well -- particularly if you have one of the diorama display bases (three different ones were made: European, Tuskegee, and Pacific -- along with a glass cover for each).
They were rumored to be working on a B-25, which I would have loved to see and likely would have bought ($300 MSRP?). And I had been hoping they would do a Corsair with folding wings, too.
Is GMP's decision to stop the line a surprise? Certainly not, I've seen it coming with the amount of dumping of GMP stock on Ebay and other auction sites for outrageously low prices. All carried an original MSRP of $140-160, but you can get several different models on Ebay and other sites for as little as $40-50!

I know, I scored a couple Mustangs -- Cripes A Mighty and Duchess Arlene for $60 each, delivered. GMP's first few waves of models were released in production runs of 1,000 or more, which I attributed to the need to dump stock. The scale is just not popular enough -- and the MSRP was pretty high, too (though I think worth it). Would they still be going if they chose 1:32? Who knows, Corgi is having trouble in this scale at lower price points.
The true sign of the line's demise was when the most recent wave of 500 run models started getting dumped just a few months after their release. I got the Marie P-51 and RAF P-40 for $150 delivered from a Dad's day sale this year, and BBD and the European diorama for $150 delivered, too. And these are now hitting the auction sites (haven't seen BBD yet) but are commanding higher prices as word of the line's dissolution gets out.
So grab 'em while you can, the upshot is that these models are likely to climb in value over time. So even if, like me, you paid full MSRP for some of yours you will likely see them regain their "equity".
So long GMP, thanks for the models!
--The Ace