Maybe someone else already found this, but I was doing some sleuthing today and noticed that if you go to https://us.brompton.com/g-line you get a fake '404 not found' error, but the image background is animated and briefly flashes a 'G' logo, with what could the silhouette of a G-Line in the background. The page doesn't actually return a 404 either, but a 200 'ok' response, which tells me this page will have some real content on it sooner than later! See animated gif below:
by foodguy5000