K I wanted to like China's Examination Hall but I think it could use a change. I understand that it's thematic to have the GPP be random, but in practice it's not that beneficial.
The fact is that some cities will never spawn particular GPs (a city that isn't working Engineers won't ever spawn a GE). I can't count the number of times I got Great Writer/Artist/Musician points in non-guild cities.
So here you have a major portion of the bonus rendered ineffective by RNG, with the only relevant benefit being 2 civil servant slots that you have to pay to use.
At least it scales with era, but I dunno it just feels too random. It's fine in the Capital which tends to work everything, but everywhere else... eh...
Maybe make it increase the highest current counter? That way you can indirectly "target" the one you want (until the GP spawns then it changes). You still have variety but it's less random and more synergistic with the city it's in.