Here is how you can add money to your balance.
Go to the 'My Money' section of the settings menu. You get there by clicking the settings button (the gear icon) in the upper right corner of your Gbox.
On the 'My Money' page, click on 'Add money' to get started.
You need to do the following steps to add money to your balance.
1. Select the amount you'd like to add
2. Select a payment method
3. Click on 'Process Payment'