Can I add multiple Visa Gift Cards to my account to use to purchase from an online vendor?

[soozaay]

I received about 4 Visa gift cards for Christmas and I'd like to use them towards a purchase from an online vendor who accepts PayPal. 

Can I add multiple Visa gift cards to my account, so that each is used, then goes to my main credit card that I have on file with my account?

Thanks!