Hi, longtime lurker here...I, too, am in the radio silence boat.
I emailed the GSC to ask if there is a wait list/how one might be notified, and I received this response: "Thank you for writing. Yes, there is a waitlist for the Ph.D program. Such applicants are notified via email." Nice, and to the point, but doesn't clarify the silence situation...I suppose I should have been more direct. Taking this as an implied rejection in the meantime ¯\_(ツ)_/¯