The Cloud API Gateway is designed to allow deployment in different regions globally. Two Gateway regions are available with the release of Command Centre v8.60 - in Australia and the United States of America (US-East).
Your Command Centre server can be configured to connect to either region, so you can choose the one closest to reduce network latency and have control over where your data transits. When you select a region, you are assured that your data will only transit through that region, and never to any others.
Gallagher will add additional regions over time, depending on customer demand and other factors. It will be possible to connect to new regions as soon as they are deployed without needing to upgrade Command Centre (beyond v8.60).