GCC offers college credit courses during the day and in the evenings, and non-credit workshops in the evenings both on and off campus. Interested persons may contact the College for information about specific offerings and costs. Interested persons may contact the college for information about specific offerings and costs. Visit the GCC website for the most up-to-date information. Regular business hours are Monday through Thursday from 8:30am to 5:00pm and Friday from 8:00am to 4:00pm.