ViewSonic gTablet Software Manual page 4

Android: Connect by 3G or WiFi
If you are using a SIM card enabled device, you should be
automatically connected to the Internet via your carrier's
data connection.
Alternately, you may connect via
WiFi. Android will scan for available
WiFi connections and connect
automatically, or prompt you for a
password if required.
You can also change your
connection settings in the
Settings application under the
Wireless & Network Settings
menu.