Go2Cloud charges for both inbound and outbound network traffic. Data transfer is measured in gigabytes (GB) and the totals are displayed on your control panel.
Usage resets at the beginning of each calendar month, giving you a fresh allocation every month.
To keep track of your bandwidth costs, monitor the data transfer counters in the control panel regularly. If you have multiple servers communicating with each other, consider connecting them via a private VLAN, as VLAN traffic is free and does not count towards your bandwidth usage.