No, access to any form of gmail is blocked.
I just came back from Shanghai, my personal gmail on my phone was never able to retrieve mail, and even my work's corp. gmail was also unable to connect. However your mileage may vary. This was in Shanghai connecting to various wifis and using my sim's (China Telecom) data plan.
However you can use this to bypass the GFW.
free vpn app: fastcat
Initially gives you 50MB, I think if you register and check-in every so often you can get more free data to use.
I live in Suzhou. And use gmail via Mail.app and iOS Mail daily. Other than around certain anniversaries, it's never been blocked for me. I do visit SH regularly -- it's right beside me -- and haven't had trouble. But YMMV. The GFW might just like me.
I wonder if it might be because I'm using Google's Apps for Business (i.e., our own domain). In my experience the GFW is much more lenient if it thinks what you're doing is work related.
However you can use this to bypass the GFW. free vpn app: fastcat
Initially gives you 50MB, I think if you register and check-in every so often you can get more free data to use.