At the moment, Nimble does not have a direct 2-way sync with Google contacts. You can always import your Google contacts by connecting your Gmail account or uploading a CSV file.
Learn how to export your contacts here: Export Google Contacts
Learn how to import your Google Contacts here: Nimble Import Wizard
If you have any questions, please write us at firstname.lastname@example.org, initiate a chat from this FAQ, or join one of our Nimble Onboarding and Best Practices sessions, held every weekday at 9 AM PT.