How much does a CoinGecko listing cost?

I'm curious to know, could you please elaborate on the costs associated with listing a cryptocurrency on CoinGecko? As a platform that provides valuable information to crypto enthusiasts and investors, I'm sure there's a specific process and potential fee structure involved. Is there a one-time fee or is it based on a percentage of trading volume? Additionally, are there any other requirements or qualifications that need to be met before a coin can be listed on CoinGecko? I'd appreciate any insight you can provide on this matter.