...
Click Show Advanced to continue to AMPED. AMPED is currently in the process of being verified with Gmail. After clicking “Go to vantage.com” com(unsafe)” you will be asked to allow AMPED permission into your email inbox.
...
Select the Labels from your Gmail that you want to be synced up in AMPED and then click "Sync Email."
*Note this can be changed at any point after initial sync. To do so, go back to your Email Integration in User Preferences and click on "Update inbox selection."
...