You can add Visa (and MasterCard, Discover, or AmEx) gift cards and prepaid cards to your PayPal Wallet, the same way you would a traditional debit or credit card.
Log in to your PayPal account.
Choose the Wallet option from the top of the page.
At the left, click (+) Link a card or bank below your existing cards/banks
Choose Link a debit or credit card
Add your Visa gift card information and click the Link Card button.
Most important, if you get an error trying to add a gift card, you will need to register the card with the card issuer "first". Make sure you ensure that the name and address you use for the card registration is the same name and address you used to establish your PayPal Account. If PayPal cannot identify and validate the owner of the card, it will be rejected.
