We have a few examples in the readme. You can find demo applications using the Guess.js plugin for webpack here https://github.com/guess-js/guess/tree/master/packages/guess...
The most real-world demo is the Gatsby Wikipedia example which Addy Osmani demonstrated on Google I/O. You can find it here at https://guess-gatsby-wikipedia-demo.firebaseapp.com/. You can toggle link highlighting by pressing "h". Red links are very likely to be visited, orange/yellow ones have mild probability, and green ones are unlikely. The highlighting is based on the model that Guess.js builds from the Google Analytics report.
Here's demo of using Guess.js with static sites https://github.com/guess-js/guess/tree/master/experiments/gu...