WooCommerce Points Gateway gives you the ability to use GamiPress points types as a payment gateway.

You can follow this guide to configure a points gateway to let your users to complete any purchase by expending an amount of points based on the conversion rate.

If you have some points as gateway already configured, then visit this guide to meet how they will look at checkout and on order details.

If you have doubts about differences between Points Gateway and Partial Payments, check this page where all differences between both add-ons are compared.