Local Viking runs a sync every 4 hours to detect any changes on the accounts.
To trigger the Google sync prematurely, navigate to your email drop down in the top right corner:
Click on 'Google Accounts'
Once in the Google Accounts tab, look to the right side and you'll see the sync button:
How to sync specific locations:
Navigate to the 'Locations' tab at the top of your screen:
Select the location you'd like to view.
From there, you'll see the right side of the dashboard includes 'Sync'.
After selecting that the sync will begin.