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Hi, I'm Mike G and I'll be assisting you. Looks fine. The wire size and size of the breaker should be 50% of the load for plugged in appliances on general circuits or 80% of a dedicated circuit and outlet.
One more thing. A GFCI is only required in certain areas, exterior, garage, unfinished basements, bathrooms and kitchen counter tops.
14 ga is good for 12A
12 ga is good for 16A