Automating blog post creation

I'm looking to automate blog post creation from a Google Form. I've been able to do this between Google Forms and Mighty Networks using Zapier, such that when a new form submission comes in, which in turn creates a new row in the related Google Sheet, it triggers a Zapier Action that automatically creates and publishes a simple post on Mighty Networks with the contents of the new row. The Squarespace/Zapier integration doesn't seem equipped for that. Is there some other tool I can use? If not, could it be done with custom code?