Here you can catch all the buses that connect to North, West and East of GTA. Go Bus and other York Region Bus and Viva.
I like the display inside the waiting area which tell you exactly the next bus departure time and at which platform.
Nice heated seating area to wait out before your bus arrives. It is such a blessing when it is - 20 C or when it is pouring rain.
Washrooms and Free Wifi also a plus.