You can add additional field, here is the tutorial for that
Our app Giftship handles this option and much more. It's totally flexible, and can be configured exactly how you need it - no coding required.
The printing of gift messages onto packing slips, or individual cards, or however you convey them to your customers can also be fully automated.
If you'd like to go over anything, don't hesitate to get in touch. Our onboarding team is always available to help out: firstname.lastname@example.org