How to update on GBS-C ?

[Yukinooooooo]

I can't update my GBS-C with ESP8266 but apparently my GBS-C is not recognised on my PC and also the serial COM port is not listed, I don't know why. How can I do ?

I've tried lots of micro usb cables but it's a failure. It's impossible to get COM for the serial port. I've even tried using other PCs, it's still a failure

I use this model New-GBS-C

I'm using under GNU/Linux