Cut each chicken thigh into 9-12 bite-size pieces. Toss chicken in gochujang marinade to coat. Chill at least 4 hours and up to 24. Preheat a grill to high heat. Thread chicken onto skewers.
Boneless chicken thighs are handy to use ... They can be tied with cooking twine, skewered or closed with dampened toothpicks, but if the pan is small enough it is not necessary.