It is mentioned in the documentation: alpha.pwstaging.com.au/docs/api-integration-guide#payment-amounts
Maybe it means «China Union Pay»?. But what does mean «GZ/Gnete» in that case?
I have got a response from the AlphaCommerceHub support:
This is China Union Pay, and is in scope for the project.
Gnete is the parent company of China Union Pay I believe.