To enable this, create a smart collection named All Products and set the condition to 'Product price is greater than 0'. You can create a collection through the 'Collections' menu in Shopify admin. Or you can turn this section off through theme settings.
Here you can purchase your gift cards for your friends or family. You can purchase more than one, there is a different code on each card for the buyer to claim, however only one card an be used at any one time