Combine jalapeño, garlic, and mint in food processor and process until minced. Add in the tequila, orange juice, and lime juice and pulse to combine.
Thread 4-5 shrimp onto a skewer and lay in a shallow baking dish. Repeat for all the shrimp. Pour the tequila jalapeño marinade over them. Sprinkle with salt and pepper.
Place skewers in fridge and let marinate for about an hour, rotating skewers halfway through.
Heat grill to medium and lightly oil grill grates. Place shrimp skewers on grill and cover, cooking for about 3 minutes on each side until pink, before moving to a separate platter for serving.