From the GIA website:
"Established in 1931, GIA is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry. "
Wendy, (my friend and "old fart" from another old fart), to my understanding, and looking at the GG requirements, it does take a number of years to complete the courses. It's not a "lesser" degree, but different. In the US there are many types of accredited schools that offer diplomas and degrees that are not universities or colleges. Just the way the system has been organized here. And of course, we have no Crown to monitor standards, lol, rather departments of the government.