I have the greyhound app and was wondering if I could book a trip and pay for it with a prepaid card from Wal-Mart or somewhere else that sells prepaid cards...

I do not know, but if it has the visa or MasterCard logo you should be able to

Yes and they are going to charge you a $18.00 gift fee.

Ok as long as I am asking,I know that if someone else is paying for you a ticket ,there's a 18 dollar fee that they charge,non rider fee,so with that being said, the prepaid card I am asking about won't have my name on it ,so will that make any difference when I go to book this trip with the app.?

As long as it has the visa or MasterCard logo, it works just like any other credit card.

As long as it's a Visa or MasterCard your good

Yes you can