Beelink CS-George Thanks you anyway.
I managed to install ARMbian (Trixxie Debian).
I downloaded the img file here (Choose the good asset you want as Trixxie or Resolute etc… from assets) :
https://github.com/ophub/amlogic-s9xxx-armbian/releases/
In my case i took the S922x Rev A Trixxie (For Serial 922HH…). Flashed it on a SD Card Or Usb Key with Rufus. And i powered the GT-King Pro with the pinhole pushed in during about 6 secondes.
It booted on Armbian, and i choosed the good DTB ( for my case “reva” REV A ).
.
Don’t need anymore to use the pinhole as you insert a bootable usb or sd card inside the GT-King.
Not bad as a little desktop Linux PC with a lightweight desktop environnement (XFCE or Mate).