To deposit supported crypto into your custody account, first, navigate to Custody at the top of your page after sign-in.
Then, scroll to Custody Balance and select “See my address” for the specific crypto you want to deposit.
You will then need to instruct your external wallet or service provider that holds custody of your crypto to initiate a withdrawal to this unique Gemini crypto deposit address. This is something that you can only initiate on your end and cannot be done by Gemini.
You can also view your custody deposit address and QR code by clicking “Transfer Funds” in the header and following the appropriate flow.
For supported Custody cryptocurrencies please see the article: What cryptos are supported on Gemini Custody?