Populate Anything is a “perk” included with Gravity Perks, which means it is an add-on that enhances Gravity Forms.
Once you have installed Gravity Perks, you will see a new option in the Gravity Forms menu in your admin sidebar called Perks.
When you click on that, you’ll see a screen that prompts you to install your perks.
Click on the Install Perks tab to get started. If this is a brand new license you’re installing, all of the perks will be listed as unregistered. Scroll down until you find GP Populate Anything and click Install Perk.
Once installed, activate the perk.