Gift items are standard templates with a fixed price: “30 min massage – €45”, “Dinner for two – €89”. Create them in Gift Cards Pro → Giftcard standard Templates → Add New, enter the Item price (several prices separated by commas become a choice), a short description and the images, and assign a category such as “Massage” or “Restaurant”.
Sell them with [wpgv_giftitems], a single item with [wpgv_giftitems item_id="12"] or a category with [wpgv_giftitems item_cat_id="3"]. General Settings → Hide price from Items hides the amount on the PDF for gift experiences.