The GX4000 was a console based on CPC hardware and games, but the amount of games released was quite small. The GX4000 and CPC need to be launched differently.
To clarify why you have way more roms than the amount listed in the hyperlist xml file: the hyperlist xmls are not a list of every game nor every version of a game for systems. They are 1G1R lists (1 Game 1 Rom) of playable games where English is the only language necessary to know. Rom sets you find from the dumping groups will have versions of the same game from multiple regions, possibly multiple dumps of the same game, and games that are unplayable without knowing German, Japanese, French, etc.
