Do you need a Date field in your Gravity Forms list column? No need to look further, this plugin does just that: it allows you to turn a list field column into a ‘date’ field.
DEMO
Demo Date Picker for List Field
Here you can see this Gravity Forms Add-on in action. This demo contains several configurations: Date Format dd/mm/yyyy, Date dd-mm-yyyy with Icon, Default Date Set yyyy/mm/dd.