Here is the info on the giftcards found on the main DIS site (wdwinfo.com). Hope it helps.
"Walt Disney World Gift Cards
The Walt Disney World Shopping and Dining Cards essentially are gift cards that can be purchased in denominations from $5.00 to $1500.00. The features are as follow:
The cards can be purchased at select merchandise and quick serve dining locations.
The cards do not expire and there are no fees applied if you carry a balance
The cards are accepted at select merchandise, dining, resort, ticketing and recreation locations
Additional funds can be added
The cards can be used in conjunction with other payment methods
Disney Dollars can be used to purchase the Walt Disney World Gift Cards
Remaining card balances can be accessed at any location that accepts the card. Additionally, cardholders can call the toll free number (877-650-4327) to obtain this information
Two receipts are issued during purchase. If a card is lost or stolen, the original receipt, not the gift receipt, is required for replacement
RESTRICTIONS:
The Disney Gift Card cannot be used at the Rainforest Cafe, Richard Petty Experience, Jellyroll's or McDonald's
The Disney Gift Card cannot be used to purchase Disney Dollars/Gift Certificates/Gift cards
The Disney Gift Card cannot be redeemed for cash. However, if you do not use your card at all, it can be returned to the original form of payment providing you have the original proof of purchase receipt. (Once you've used it, this can't be done.) "