Can I use a gift card to add money to my Apple Pay account

Welcome to the Apple community where some of us do our best to help each other.

Re: Apple Pay

Seems only cards issued from participating banks can be used with Apple Pay.

For details: Countries and regions that support Apple Pay – Apple Support (AU)

Re: Apple Gift Cards

There are a few different apple gift cards.

To find out which one you have, 

and what you can do with it, 

Apple has a support page (link below) to help.

What type of gift card do I have? – Apple Support (AU)

See the article below for what payment methods you can use in your country or region:

Payment methods that you can use with your Apple ID – Apple Support (AU)

And

If your card works with your Apple ID:

What you can buy with your Apple Gift Card or Apple ID balance – Apple Support (AU)

Or

How to: Add money to your Apple ID balance - Apple Support

How to redeem your Apple Gift Card or App Store & iTunes gift card - Apple Support

Hope this helps :-)