Payment Gateway lock currency in AUD

Greetings,

We’re trying to use a payment gateway but the payment gateway only accepts GBP and we only want to show AUD pricing to users. What we want is in the backend (WooCommerce) the price is still using GBP but when users surf our pages on product page and checkout page, the price will be in AUD. Simply, we want to lock our frontend to use AUD and the backend with GBP.

Is the plugin currently supports this feature? I’m looking forward for your answer.