Is there a database of GTO stats?

It depends on lot of factors, so its tough to give some definitive GTO numbers. But what you can look into other than obviously preflop charts, is aggregate reports for flops. You can use tools like GTO Wizard or DTO to give you some idea about how often to cbet, what sizings to use the most often etc. But as I already said, there are lot of factors going into it, some stats can be interchangeable pretty well (you can play higher flat, lower 3bet or lower flat, higher 3bet and both strategies can have pretty much the same EV)...

You can run aggregated reports in Pio or generate Pio HHs and import those into a hud

You can see Pio is way below MDF in this line

Mobius Poker has a GTO stat checker with nearly every spot mapped out with GTO frequencies. I have no affiliation with them, but you can buy it here: https://www.mobiuspoker.com/stat-checker

Video here:

Doesn't seem to be anyway to contact the anyone on that site. Do you know if GTO stat checker works with anything besides hand2note?

You have to use hand2note.

- I remember reading somewhere GTOwizard would launch a GTO hud somewhere in the future. Still waiting.

- Mobius.

- Run scripts in PIO for every spot and use aggregated reports.

- An approximation of GTO might be downloading Pluribus 10k hands and importing them into your database software.

Their roadmap says aggregated reports for all spots are coming soon, so until they implement a full stat checker system, that would work well.