It's quite cool. It's very gritty and simulationist and realistic, very much in the spirit of Cyberpunk 2020 (e.g. with plenty of hit locations, more situational modifiers than you could ever want, and gun combat that simulates recoil and fire rates and target range, speed, and size) but the cool thing about it is that it's more of a modular set of interlockable rules and components that're designed to be mixed and matched and adjusted and combined while still being balanced in order to let you simulate basically anything or genre you want — with exactly the level of detail and crunch that you want.

For instance, the cyberware in this repo isn't home brewed rules whipped up from scratch — they are actually meta traits that combine various existing advantage and disadvantaged traits from the published rule books in order to create the desired effects of the cyberware! And GURPS actually has rules for making such combinations.