All gift cards purchased through the GCX platform are archived permanently in your account via the website only. To access the deleted gift card, log into your GCX account on a computer or a mobile browser and go to My Orders.
Once you have located the gift card, click Reveal Card Details to view the complete serial number and PIN. Within the app, you can add it back by clicking the + button under the My Cards section. Following the prompts to enter the gift card information.