Cut the pork loin into 1-inch cubes and place them in a medium glass bowl.
In a small jar, whisk together the gochujang, tamari, toasted sesame oil, honey, minced garlic, and grated ginger until smooth.
Pour two-thirds of the marinade over the pork, tossing well to coat, and let it marinate for at least 20 minutes.
Slice the zucchini into half-inch thick rounds and season lightly with sea salt and black pepper.
Thread the marinated pork cubes onto skewers, alternating with the zucchini rounds for a balanced bite.
Heat a grill pan or outdoor grill over medium-high heat and lightly grease with the avocado oil.
Grill the skewers for 3-4 minutes per side, brushing with the remaining marinade during the last 2 minutes, until the pork is charred and cooked through.
Remove from heat and let the skewers rest for 2 minutes before serving hot.