Hi Jason,
KiGoo uses https protocol to connect to Google Calendars API.
Please, ensure that the proxy server has the https protocol enabled
for KiGoo users.
In order to test if this is enabled, you can open a browser, login to
Google calendar with your user and once logged put this address to the
browser:
https://www.google.com/calendar/feeds/default/private/full
If you can see the default calendar events, means that the https
protocol is enabled in the proxy server.
Please let us know if it was helpful.
KiGoo Support Team.