At present, there is no authoritative evaluation on the authenticity of Gu Weifang's calligraphy lecture hall. Some people think that the courses offered by Gu Weifang are disguised pyramid schemes to cheat money, while others think that they are formal institutions that provide calligraphy learning.
The evaluation of institutions should be based on full investigation and understanding. If you are interested in the calligraphy lecture hall in Gu Wei, I suggest you do further investigation and consider consulting professionals.