No "goto" needed. It can just be there. It's a map, with a moving "you are here" point on it, and therefore is a system for navigation. I think it is clear, a GPSr is allowed regardless of what you are doing with it (as long as it is not in your hand).
It would be impossible to have the law state otherwise. If they tried to that, there would be a revolt of vehicle owners with built-in navigation systems.
But there must be a section dealing with programming the navigation device while moving, because you can't do that.
There seems to be sections dealing with programming as well:
" Wireless communication devices
78.1 (1) No person shall drive a motor vehicle on a highway while holding or using a hand-held wireless communication device or other prescribed device that is capable of receiving or transmitting telephone communications, electronic data, mail or text messages.....
Hands-free mode allowed
(3) Despite subsections (1) and (2), a person may drive a motor vehicle on a highway while using a device described in those subsections if the person is not holding the device.
6) Subsections (1) and (2) do not apply if all of the following conditions are met:
1. The motor vehicle is off the roadway or is lawfully parked on the roadway.
2. The motor vehicle is not in motion.
3. The motor vehicle is not impeding traffic"
So, to read this, if you've set a goto and your GPSr is in its mount, you should be OK. I guess it remains to be seen to what extent this will be enforced.