As I get older, I've never been accused of having a good memory..... but I am fairly certain, this was the case back in 2018 as well. There has been zero change to the configurations since launch. I remember (again, using that term loosely), when the Stinger launched, comparing the GT trim to the GT limted trim and distinctly thinking to myself, the LSD (Limited Slip Differential) option was worth the price upgrade alone, but also thinking that should be standard across both trims because of the power levels.
So if you have a 2018, GT Limited, Canadian car, you will have AWD and LSD (Limited Slip Differential).... I'd bet beers on it