16 with g2 can I drive a company vehicle?

I'm currently 16 with my g2 license in Ontario. My grandfather owns a business and has a couple trucks (2005 Ford F-350 and a 2006 dodge Dakota) I was wondering if I could borrow one of them for the weekend and be covered and everything. I also am on my mothers insurance as a occasional driver if that helps.

Class G2

Level Two of graduated licensing. Holders may drive Class G vehicles without accompanying driver but are subject to certain conditions.

Class G

Allowed to drive any car, van or small truck or combination of vehicle and towed vehicle up to 11,000 kilograms provided the vehicle towed is not over 4,600 kilograms. A pickup truck towing a house trailer exceeds 4,600 kilograms, but the total combined weight of the truck and trailer does not exceed 11,000 kilograms is deemed a Class G vehicle. A Class G vehicle has a maximum capacity of 11 passengers.