Keap Integration with Clickfunnels

I currently use Keap (formerly Infusionsoft) connected to a PayPal Pro (Business) account to process online payments.

We also use Clickfunnels, but we can’t integrate Keap directly with Clickfunnels and CF support says we must use as our payment gateway.

So my question is, with our current set up; Keap integrated with PayPal Pro, will that stay the same ad do we just add in as a payment gateway (with payments still going through PayPal Pro), or does have to replace PayPal Pro as our merchant account?

If anyone can answer that for me and give me the best solution and any costs involved I’d appreciate it.

Thank you.
Mark Dawes