Google DNS doesn't work
Yes, you can make a network setting and override the dns on each Mac easily given that the dns isn’t blocked on the network and is just not chosen / advertised. 

Google has steps - scroll down to macOS section: https://developers.google.com/speed/public-dns/docs/using

I also encourage you to try cloudflare dns. Setup is just as easy and the config app and setup screens are easier for me to recommend, and you could sub the google values as you please if this setup guide is simpler:


https://1.1.1.1/dns/