edit: Perhaps the lesson here is the more useful something is, the less freedom you have in using it. After all, why would regulators care if you can "use bitcoin" when "use" means "play with my private keys".
Transfer the bitcoin from your wallet to any other non Gemini/Coinbase wallet. Most crypto people have private wallets. You can also use something like localbitcoins or Bitcoin ATM. Or you can literally meet with a person selling something for a coffee, transfer BTC to their wallet, they wait few minutes for on chain confirmation, give you stuff you bought, done.