The Polkadot network enforces an initial deposit minimum of 1 DOT for wallet addresses. In order to support DOT deposits, Gemini enforces an initial deposit minimum of 1 DOT for all DOT deposit addresses. Any initial deposit of less than 1 DOT will not be credited towards your DOT account balance.

Note for UK customers:
As of 17th November 2023, only transfers of ERC-20 tokens, ETH, and BTC are supported on Gemini. Whilst you can still freely trade and hold these unsupported tokens within Gemini, we will be removing the unsupported tokens from deposit and withdrawal options, with the exception of transfers to and from a self-hosted wallet. Read more here