Soak four wooden skewers in water for at least 20 minutes to prevent burning.
Trim any excess fat from the pork loin and cut into uniform 1-inch cubes.
In a small bowl, whisk together the gochujang, coconut aminos, raw honey, toasted sesame oil, grated ginger, and minced garlic until smooth.
Place the pork cubes in a glass bowl and toss with half of the gochujang marinade, allowing it to sit for 15 minutes.
Cut the red bell pepper and red onion into 1-inch pieces suitable for skewering.
Thread the marinated pork, bell pepper, and onion onto the skewers, alternating between the meat and vegetables.
Lightly season the assembled skewers with sea salt and black pepper.
Preheat a grill or grill pan to medium-high heat and lightly oil the grates.
Grill the skewers for 8 to 10 minutes, turning occasionally and brushing with the remaining marinade during the last 3 minutes of cooking until the pork is cooked through and the edges are beautifully charred.