To sync your GigaBook contacts with your Mailchimp account, go to https://gigabook.com/settings/gigasync, or do the following steps:
- Hover over Gear icon and click Settings Hub.
- Under Data & Sync, click Sync 3rd Party Calendar.
- Scroll down to Mailchimp section.
- Input Mailchimp API key and click Save.
- Click Plug icon located at the upper-right corner to export to Mailchimp