Shopify doesn't expose the full gift card code in either the Shopify API or the Shopify Admin, only the last 4 characters of the gift card can be viewed. This data is available in the order transaction's receipt data.

To export the last 4 characters of the gift card code in EZ Exporter, you can use the formula below in the Calculated Fields section:

get_attribute_value({{ transactions.gift_card.receipt }}, "gift_card_last_characters")

If multiple gift cards were used to pay for the order, all of them will be included and the values will be separated by a comma.