This is a service which is supposedly responsible for about 11 billion in Googles revenue [1] and apparently has no Spam protection.
[1] https://finance.yahoo.com/news/google-maps-poised-11-billion...
I've used GMaps for navigation while on vacation in remote areas and the routing will be completely different than Waze, even when settings are made identical when it comes to time-vs-distance, avoid tolls, etc. Waze is much, much better.
So you'll pick the major highways and follow any detour signage like you would have in the old days.