How is 3400+ GPT possible?

I am in the middle of a Level 4 game of Brave New World (141 turns remaining), playing Pocatello. For the last 25 or so turns Maria I has been pumping out 3400+ GPT. I have never seen that level of Gold production before. How did the character get to that level?

I think Maria I has one of the higher gold flavors.
She also gets a gold bonus from trade routes.

Also with this being a scenario, perhaps she's built all buildings and has her cities set to Wealth.

trading, her UA, direct gold making, going wide, social polices, golden ages. theres really a multide of factors that can be involved in gold genrating. assuming she has all all those factors applied, she making a gold deal of money. either that or its a glitch. likely a glitch :/

This is a common UI glitch. She doesn't really have that GPT generation rate.