What is the GMP3 protocol?

Question

Computer networks

I am developing a cash register application. At the moment, adaptation to Turkey is underway.
When communicating, the question about GMP3 constantly arises. What it is? As I understand it, this is connected with some kind of protocol for communicating with the cashier, but I could not find specifics in Google.

Screenshot from documentation

Answer 1

Something Turkish.
Google translation page:
GMP3 ( Gelir İdaresi Mesajlaşma Platformu )
• TSM ( Trusted Server Manager – Güvenli Servis sağlayıcı / ÖKC firma Server'i )
GMP3 ( Revenue Management Platform) • TSM (Trusted Server Manager
)
• If GMP3 is a wired POS ,
• The TSM protocol defines the wireless connection to the cash register.

Answer 2

It is clear but nothing is clear)
It would be great to have a link to a detailed description of the platform. Well, or at least a drop of some kind of sensible documentation. And then he got really desperate.