If the debit card from project QUSD will be accredited with the Visa or Mastercard system, then I think that it will not be difficult to get support from the GooglePay service. Well, or develop your own mobile application with PayPass.
It is very difficult to start cooperating with such companies as visa and mastercard, they do not take regular projects to themselves, as they have been on the market for a long time and have their own high rating.