Don't know from where you are posting, but no issues using Google Maps upon N8 running Belle in UK!
Symbian specialist until 31/01/2013 with interests in Maemo & MeeGo but an aversion to Windows!
If it does open, but it doesn't work because it cannot connect to the internet, there is one thing you could try. First make the Wifi/Mobile data connection and after your phone is connected, open the Google Maps.
The wifi trick does not work for me. I've tried all combinations of wifi/3g on/off connected/not connected.
I start the app, the screen goes black for half a second and then the app closes.