Been re-watching Legend of the Condor Heroes and was stuck by have similar these two characters were:
Background:
Both lost their fathers at a young age
Both were abandoned/betrayed by their own people
Both were raised by a strong willed single mother
Personalty:
Neither were book smart, but had natural affinity in their chosen field
Both greatly values brotherhood and loyalty
Both were fiercely patriotic
Interaction with others:
Both married very smart women who supported them in the background
Both were betrayed by a sworn brother
Both had a common enemy in the Jin
Given all their similarities, would it be possible that Jin Yong took inspiration from the real life GK when he created GJ.