Cryptocurrency Exchange: Does coinbase charge you for gas fees?

I’m reading this article which says coinbase could charge you for gas fees.

However, when Ethereum gets congested, Coinbase will charge you for
gas fees too. When it comes to gas, Uniswap and Coinbase are a wash.

Is this actually true? I was under the impression that coinbase only charged you market fees, like any other centralized exchange.

The fee page on coinbase makes no mention of gas fees.