Mode of Payment for Apple Store

Hello po, planning to buy an Ipad for this upcoming pasukan and apple have this promo na you can get free apple pencil if you buy an ipad. Ask ko lang po ano ano ang pwedeng payment methods for apple online store? We don't have credit cards and the ipad will be the first apple product sa family namin as we don't have an apple id yet (sa iba naming relatives meron). Pwede po ba ang gcash?

Also what are the requirements po for student discount? Sa The Loop po kasi is student id and certificate of enrollment lang