The first occurrence
And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. Gen 1:16
The primitive root
gimel ג = the foot, thus foot, walk, gather
dalet ד = the door, thus enter, move, hang
lamed ל = the shepherd’s staff, thus teach, yoke, to, bind
The story: Gathering together (gimel) to enter into (dalet) or press upon another with authority (lamed). If one can summon others and then successfully press upon rivals so as to extend authority over them, then that one becomes renowned for greatness.