Gemini’s fee schedules are publicly available here, and you should see the fees you’ll be charged when you place any trade on the Gemini Exchange.
Unfortunately, there are fees that are outside of Gemini’s control, which may be charged by your card issuer or bank. This includes any ITA fees, transaction fees, or foreign exchange fees that you may see on your statement.
We try to reduce impact to our customers, but do not have visibility into banks and card issuers that charge their customers for using Gemini. Gemini does not receive any of these fees from your bank or card issuer, therefore we are unable to refund them.