As GAAGO is not available to view on the island of Ireland, you won't be able to access it using an Irish mobile roaming connection (3G/4G). 

Whilst roaming, your network still provides you with an Irish IP address so it thinks or will read that you are in Ireland, not the country you are in. 

Simply turn off roaming 3G/4G, clear your cookies and cache on the device you are trying to access the service on, connect to a secure WiFi connection and log back in. This should grant you access.