G-Police had great, fun but very challenging combat & flying mechanics, with a interesting presented story, and fantastic FMV cutscenes doing wonderful world-building. It's a nice mix of arcade and flight-sim lite gameplay, in a futuristic Blade Runner inspired colony on Callisto, where gang wars and ultra-powerful corporations fight amongst themselves, with you trying to keep the peace!
G-Police came out on both PC and Playstation, so updating it for modern systems would be much easier compared to console only releases. It's abandonware, so it'd be right up GOG's alley for restoring it, thus allowing newer audiences to experience it.