a1c47b6d_ation__NVP____PayPal_Developer__Field
[Description] (Optional) Whether the buyer selected a gift receipt on the PayPal pages. It is one of the following vaues: true – The buyer selected a gift message. false – The buyer did not select a gift message. [Field] 
GIFTRECEIPTENABLE
DoExpressCheckoutPayment API Operation (NVP) - PayPal Developer
Field