Rub the pork shoulder with the salt, pepper, paprika, cumin, and garlic salt mixture.
Cook the pork shoulder in a slow cooker with the chicken broth on high for 5 hours (or low for 7-8 hours)
When the pork is done, use two forks to shred it into pulled pork.
Chop the pickles and onion and combine in a small bowl with a pinch of salt and 1-2 tablespoons of pickle juice. Refrigerate for at least an hour.
Cut a ciabatta bun in half and top with pulled pork, relish, mustard, and cheese.
Toast the halves in a toaster oven until the cheese is melted, then sandwich the two halves together.
Enjoy!