Yes. Add a tip on the rating sheet after the ride, or later with Add tip on the trip, for up to 30 days. One tip per ride, charged to your default payment method, never to credit. GuyWay is cashless, so there are no cash tips. All of a tip goes to the driver.
Can I tip my driver?
Yes, in the app for up to 30 days after the ride. All of it goes to the driver.