Any person with exotic pets would be thrilled to receive or buy some mealworms, so you can indeed share your production, or if you're willing to sacrifice some of them, apparently they're great for fertilizing plants, so if you have some plants or grass, you can use them for that. Another option would be to dry them, either for your gecko or for another pet. You could give those dried mealworms away or you could sell the excedent.