There is more than one artist with this name.
(1) Gemini is a 22 year old Dubstep producer from Leicester. He released his debut EP 'Blue' in 2011 and followed up with the release 'Graduation' shortly after.
He has remixed many artists including Hadouken!, Ed Sheeran, deadmau5, and Lana Del Rey, and is now set to collaborate with electro producer Feed Me on the upcoming Feed Me EP. (2) Gemini aka. GemStones aka Demarco Castle is a rapper and singer from Chicago, formerly signed to Lupe Fiasco’s record label 1st & 15th before the crew broke up.

Read more about Gemini on Last.fm.