Slow Cooker Pulled Pork Gyros

• 1 tablespoon chili powder
• 2 teaspoons cumin
• 2 teaspoon dried oregano
• 2 teaspoon cayenne pepper
• 1 ½ teaspoon salt
• ½ teaspoon ground pepper
• 2 1/2-3 lb pork loin excess fat trimmed
• 2 tablespoons olive oil
• 4 cloves garlic peeled
• 2 Red Onions quartered

For the slaw

• 3 tablespoons Greek yogurt
• 3 tablespoons mayonnaise
• 1 ½ tablespoons apple cider vinegar
• 1 ½ teaspoons sugar or more to taste
• 1 ½ cups shredded cabbage
• 2 carrots peeled and grated

For the gyros

• 8 pita bread toasted
• 1 cup cherry tomatoes halved
• 2 avocadoes halved, seeded, peeled and diced