Beware - its obviously a scam, easiest way to check is to verify that this is on the
actual Gemini website and/or social media, which its not.
When you follow the link in this case on twitter you find out in order to get your
FREE BTC you of course have to SEND BTC.
The address supplied by the scammers only shows 1 transaction, hopefully
not too many people get scammed.
https://www.blockchain.com/btc/address/147MZscN2z2YRJMdsw7s7N1M2uSkVt5yur
The scam link >
https://twitter.com/williamamavi/status/1350185806745505793?s=19
Bitcoin.com have actually run an article on similar scams