Ground News doesn't have its own independent rating system. It doesn't call spades a spade. It averages the rating from three independent sources.
The Ground News bias ratings assess the political bias of news publications. They are based on the average rating of three independent news monitoring organizations: All Sides, Ad Fontes Media, and Media Bias Fact Check. Each news monitoring organization has their own methodology - including editorial reviews, blind bias surveys, independent reviews, and third party research. The analysis is done in the context of the U.S. political system.
You can edit it's rating for your own profile if you want.
I'm right there with you. Doing it now. The more stumbling tired I get, the better.