Our stored code function can send multiple codes out if multiple quantities are purchased.
However, if you are selling gift coupons, those codes have to correspond to discounts that you have created in your cart, and multiple discounts of that nature cannot be applied to a single order.
I would recommend disabling the buyer's ability to buy larger quantities of gift coupons to avoid situations where a buyer sends several small coupons to a gift recipient with the intention of having them all used at once. These are coupons, not gift certificates with an inherent monetary amount.
