The Gemini Card Game (GCG) can now be played on the site Tabletopia! https://tabletopia.com/games/the-gemini-observatory-card-game 

You do not need to own a card deck anymore, you can play with anyone, anywhere, and you can enjoy the improved gameplay, with a new game board and automated set-up.
For more information, visit www.gemini.edu/gcg.