I just found this information on the Disneystore.com website...
Where can I redeem my Disney Store Gift Card?
Your Disney Store Gift Card is redeemable online at Disneydirect.com, through the Disney catalog, or at any Disney Store location in the United States.
How do I redeem my Disney Store Gift Card at Disneydirect.com?
At Disneydirect.com, simply enter the Disney Store Gift Card number found on the back of the card in the Gift Card Information box on the payment page along with a credit card number (required for Gift Card purchases at Disneydirect.com). If the total of your purchase exceeds the amount on your Disney Store Gift Card, the balance will be charged to your credit card. Please note: you may only use one Gift Card per order.
How do I redeem my Disney Store Gift Card through the Disney catalog?
At the time of payment, simply provide the Disney catalog Cast Member with your Disney Store Gift Card number, found on the back of your card. If your purchase total exceeds the amount on your Disney Store Gift Card, you may pay for the balance with a credit card.
How do I redeem my Disney Store Gift Card at a Disney Store location?
To redeem your Disney Store Gift Card at a Disney Store location in the United States, simply use your Disney Store Gift Card to purchase merchandise as if you were using a credit card. If the total of your purchase exceeds the amount on your Disney Store Gift Card, you may pay for the balance with cash, check or credit card.
If you prefer to mail your Disney catalog order, complete an Order Form and provide your Disney Store Gift Card number, found on the back of your card, as the method of payment. A personal check will be required for any balance greater than the amount of the Disney Store Gift Card.
Does my Disney Store Gift Card have an expiration date?
No, Disney Store Gift Cards have no expiration date.
Who do I contact if I have a problem with my Disney Store Gift Card?
Please call Guest Services at 800-328-0368 for any problems with the processing of your Disney Store Gift Card.
Can the Disney Store Gift Card be purchased internationally?
No. At this time, Disney Store Gift Cards are currently available for Domestic delivery only through the Disney catalog and Disneydirect.com, and are only available at Disney Store locations in the United States.
Hope some of this helps you bavaria, so you can purchase something online for yourself or someone else! Maybe you could get yourself a nice sweatshirt for your trip to Disney! Good Luck!