Email: I use outlook.com, but I shut my gmail account long before gmail was blocked. I'm weird.
maps: Apple Maps on an iphone works well enough. Not sure if gmaps on Android works or not. Many Google services still work even if a few are blocked.
Browsing: many websites work in China, but I also had full internet access at work for when I needed it, so Facebooking family was easy enough, I just didn't use it at night when I was at home...I didn't miss it.
Its definitely isolating, but not incredibly so. If you are addicted to social media, this can even help you become unaddicted, weird therapy for sure :)