Ref: HYC198318 If you don’t have an account and you want to get started they offer a sign up process with $10 are free Bitcoins for you and once you buy or sell a $100. As Gèmini is a centralized and regulated exchange and therefore you will need to enter your personal details such as your name, address and photographic ID. Once you are logged in and signup Gemini login you will be presented with the dashboard and will be over in the market tab at the top of the display. If you have just signed up it will prompt you to verify your email and add a funding source if you have not already done so.
More details: Gemini Exchange