I read earlier that the Ps5 can be pre-ordered soon, but I already pre-ordered it at gameStop? I paid 200 euro and then I pay the rest when I pick it up. Or how does it work?
You answered your question yourself. You pre-ordered from GameStop.
But why is it on the internet that you can only register now?
No idea. GameStop will have thought of something. Doesn't matter, you pre-ordered and finished. Don't worry about it.