If you wanted to nudge your post count along you could go to the introduce yourself thread and introduce yourself , if you haven't already. Find some other threads to comment on, you'll be at 10 in no time.
Obviously I will defer to CyclesMakaron on all this, but I think the lack of number holder makes it very unlikely it was a Gan team bike. The KC on the steerer I thought was the code for chrome rear drive side and dropouts, and fork crown. The 3 will be the size of the frame the fork is for I believe.