Gary Bell Jr. is headed for the desert to be an assistant coach for the Northern Arizona University men’s basketball team. The former Zag standout joins Shane Burcar’s staff after spending the last three seasons on Gonzaga’s bench as a graduate assistant and coordinator of basketball administration. “I’m extremely excited to be here at NAU,” Bell said in a news release. “The culture that (coach Burcar) is trying to build here is where I came from; the family atmosphere and being a hard worker to get better every day.” Bell returned to GU in 2019 following his stellar four-year stretch…