What's the difference and where can I found the none gx version that would be approuved here, I see the game on different websites.

Gx runs a little differently I guess

Where can I find the normal version?

The GX version lets you point slightly downwards, but high offers an amazing advantage in Any%. And you can find the normal version on Itch.io, which you can get to easily by just clicking the button that says “web” at the top of the speed running page and under where it says “Grapple Tongue.”