Great Falls & Canada Ry was affiliated with Albert Railway & Coal Company. I seem to recall that there is roster coverage in the book
Narrow Gauge Railways of Canada by Omer Lavallee. My library is disorganized at this time and I cannot easily find my copy. But I seem to recall that a locomotive from one of these companies ended up with the Tanana Valley operation.
Here is a link to the depot museum located where the two railroads connected at the border. At the bottom of the page are a couple of photos of locomotives that look similar..
The Great Falls & Canada Railway
BN