If you have some particular menu items that should be discounted with the Promo code on the order, you would not need to make any changes to the QC as only certain items will be discounted.
In case, where the discount is being applied to the complete order, to exclude gift cards from discounting in the order,
- Identify the POS Item Ids for gift cards that are being sent to Punchh.
- Create a Line Item Selector for the gift card Item ids.
- While creating Qualification criteria for the coupon/promo campaign, attach the gift card LIS in the Line Item Filter section and select exclude operator.
This should exclude the gift card ids from getting discounted with the order.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)