If you have logged into Moodle before the first day of classes, you may not see your course. Courses are open to students the first day of classes each term. See the GCC academic calendar for specific dates.
In addition, instructors need to “turn on” their courses in order to make them visible to their students. If you are still not seeing your class when you log into Moodle on or after the first day of class, it’s possible your instructor has not yet made the course visible. Email your instructor first, and if you are still unable to see your course submit a HelpDesk ticket for support.