NOTE: In order to use our Gravity Form integration, you must download the ConvertKit's Gravity Form plugin. (Rather than using the default Gravity Form plugin) Here's a direct link.
Common issues we see with Gravity Integrations are related to areas we don't currently yet support with our Gravity Integration. We currently support:
Passing over the first name field
Passing over the email field
We do not currently support passing checkboxes or dropdown values to Tags, even through a secondary integration step like Gravity Forms >> Zapier >> CK integration.