Q: will family share pull from my gift card balance?

Hello Tfreier31,

Thanks for using Apple Support Communities.

If I understand correctly, you are wondering how Family Sharing purchases are billed.  In the case of both the family members and the organizers, if a gift card balance is present, then that is used before a credit card.

Which payment methods will be used first?

When you make a purchase, content credits are used first, followed by Gift Certificate, iTunes Card, or Allowance Account credits. Your credit card or PayPal account is then charged for any remaining balance.

How iTunes Store purchases are billed - Apple Support

Making purchases

After you set up your family, any time a family member initiates a new purchase it will be billed directly to your account unless that family member has gift or store credit. First, their store credit will be used to pay the partial or total bill. The remainder will bill to the family organizer's card. 

Family purchases and payments - Apple Support

Have a great weekend,

Alex H.