When you receive a gift card payment this shows in your dashboard as a payment with "gift card". 

Be careful: When another payment method is being used together with a gift card, a stacked payment, then this payment method won't be shown at the specific payment method but only as a total of a gift card payment. For example, €10 via a gift card and €40 via iDEAL, this will show as €50 with gift card in the Dashboard statistics. 

When you click on the details of the gift card payment, you will find the details of the gift card and the other payment (when applicable).