The short answer is, practically all fiat currencies around the world are supported. 

MoonPay supports making payments with both credit and debit cards that are endorsed by VISA and MasterCard and because of this, all fiat currencies around the world are supported either directly or indirectly.

Below is a list of fiat currencies that are directly supported, which means that these do not need to be converted into another fiat currency before exchanged into your cryptocurrency of choice on GokuMarket:
Australian Dollar (AUD)

Canadian Dollar (CAD)

Euro (EUR)

Israeli New Shekel (ILS)

Norwegian Krone (NOK)

Polish Zloty (PLN)

Pound Sterling (GBP)

Russian Ruble (RUB)

South African Rand (ZAR)

Swedish Krona (SEK)

Swiss Franc (CHF)

US Dollar (USD)

[Latest update 2020-06-20]