Hello Georgio,
You can accomplish this in many ways:
1. Use Google's webservices via HTTP requests (see WinDev and Google on-line documentation) using .NET webservices in WinDev 12.
2. Upgrade to version 14. As far as I know WinDev 14 (and I think also WinDev Mobile 14) has built-in functions for using Google's webservices. WinDeb 14 Mobile has also built-in support for Google's Android OS. In this case you need to upgrade your current version.
Good luck,
Erik