The guy who cut the gyms passed away. I myself am still at the learning phase. However I'm sure she can direct you to locals who do. She also sells cut gyms.
The Columbia Gem and Mineral Club has member who can teach how to cut gems. Some of the other members also cut gems. They meet every third Monday of the month. Club has a club house where to learn.
They no longer cut gems, however she can give you an application to the SC gem association. To my understanding, you either learn to cut gems or have them done within the association
I do know they used to cut gem stones. I usually send mine to Lambert Industries, in Thailand. It is cheaper that way.
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