Yes, you can convert USD to USDC, but it is not a 1:1 ratio. USDC is a stablecoin, meaning that it is pegged to the value of the US Dollar, so it is worth 1 USD. However, when you convert USD to USDC, you will not get a 1:1 ratio because the exchange rate can vary depending on the market conditions. You can use an exchange like Gate.io to convert USD to USDC, but it is important to keep in mind that the exchange rate may not be 1:1.