I am assuming "Nexus enrollment on arrival" is pretty similar to GE on arrival. I am planning on doing my 2nd part Nexus interview in YYZ T1 next month before my USA flight (same as GE, no appointment required). Has anyone done the GE process at YYZ? Do I just go up to the CBP officer as I usually do to clear customs before my flight and tell them I want to do the interview or is there a separate line I would need to get into? Was planning on using the MPC app if I have to do the regular process.