Great article, thanks! The thing that has always made me a bit hesitant with Canadian whiskey is #2 (and 10, kinda related?) and the whole GNS scenario. I suppose that someone MAY define some of the grains used as a GNS, but sounds like it is NOT in the scenario that it is typically presented. Perhaps it is time to consider giving my northern neighbors some love in sampling of their whisky.
No, as the article makes clear . . . NO grain neutral spirits are allowed, even under the 9.09% rule. If you are anywhere close to the Canadian border, you should slip across when it reopens. Usually a wider selection.
But if you have some at your local, I'd be happy to recommend something.