Download and install Gravity Forms on WordPress and activate your license.
Download HeyTodos from your DLX Plugins account.
In WordPress, go to Plugins > Add New and upload the HeyTodos ZIP file.
After activating the plugin, head to Forms > Settings and find Todoist.
Connect to Todoist via the Onboard Wizard.
Add a new feed to a form by going to Forms, selecting your form, and finding Todoist.
Configure your feed settings and test a few submissions to verify tasks are created in Todoist.