I am not sure about Gerontology but on 4th Nov, I have applied for Master in Computer Science and I got conditional offer letter on 9th Nov. I am completing rest of my documents yet and planned for September 2020 intake.
Since there are usually lots of MBA spots compared to masters programs which are usually smaller you shouldn’t have to wait too long if your marks are good. Brock isn’t really a destination of international MBA students so they are likely to approve someone who will pay international tuition. Sounds awful but it is true.