Up-to-date GSC files

Hi.

I'm in search of raw GSCs but the ones I find are waay outdated, dating back when the game was released. Why no one posted the latest GSC files?
Is it even possible to extract them?

Its not possible. The GSC files that we have came from the Wii version, which is the only place where raw uncompiled GSCs were leaked. The files were protected with later versions of the game.