Is it possible to read GET request (S2S Postback)

Hello!

I am trying to update user data once their status changes on another platform.
Platform can send GET request with parameters in url. It is Server to Server request.
All I need is to read the incoming GET request parameter, find user id and update corresponding user details.
I saw that it is possible to receive incoming POST requests, does GET work as well?
Are there any workarounds?

Hi, I need help with this too! Is this possible?