The market will resolve based on the GDP growth percentage figures as reported on this trading economics page: https://tradingeconomics.com/country-list/full-year-gdp-growth
The market resolves once at least 90% of countries on the list have a reference period Dec 24 or later. Everything listed in that table is eligible even if it is not unambiguously a country. Countries' latest GDP growth percentages will be used even if the reference period isn't ending in Dec 2024.
If the page becomes unavailable, I'll N/A the market as GDP growth rates vary too much between different sources and thus the choice of replacement is too subjective. I will N/A any duplicates added to the list.
@spiderduckpig While I don't really understand why, note that Guyana is not in the stated resolution source.