The ISN has a great feature that allows for syncing of ISN and Google Calendars!
The Google Sync settings allow you to set up exactly what information is sent to Google and also allows for either a one-way sync (Only send ISN based events to Google), or a two way sync (Send ISN based events to Google and Google to send calendar event information to ISN).
Navigate to Settings -- Office Settings -- What we See on the ISN -- Google Sync:
For a One-Way Sync, ISN only sends info to Google, click on the following setting:
To allow for a Two-Way Sync, do not enable that setting.
The remainder of the information on this Google Sync page allows you set exactly what information from the order will be sent to Google.
As always, remember to click on Save Settings for any changes that have been made!