Use GamiPress points types as a payment gateway for Easy Digital Downloads
Easy Digital Downloads Points Gateway gives you the ability to use GamiPress registered points type as a payment gateway on Easy Digital Downloads.
In just a few minutes, your users will be able to complete any purchase by expending a number of points.
Just define the conversion rate and this add-on will make the conversions automatically on each purchase.
GamiPress – Easy Digital Downloads Points Gateway features

Use GamiPress points types as a payment gateway for Easy Digital Downloads

Easy Digital Downloads Points Gateway allows enable or disable new gateway per product?
No, Easy Digital Downloads Points Gateway is designed to register each points type as a new payment gateway.
The feature what you are looking for is known as “Conditional Gateway” and Easy Digital Downloads already offers a plugin specially for this purpose that you can check here.