This form is using a plugin called Gravity Forms. It is not included with your theme or the Genesis Framework. There are many free contact plug-ins that can be used to create a form. We use and love Gravity Forms and recommend them anytime we can.
We Build Exclusively for the Genesis Framework
All of our themes, require the Genesis Framework in order to function. If you do not already own the Genesis Framework you can click here to purchase it. The Genesis Framework is a one time purchase and good with any Genesis child theme.