Element: Air
Mode: Mutable
Zodiac Symbol: Twins
Key Motivations: Mental stimulation, verbal expression, connecting with people in their environments, love of travel and movement
Outstanding Attributes: Conceptual thinkers, communicative, mentally versatile, intelligent, witty
Center of Body Activity: Lungs, shoulders, and hands
Mythological Characters: Hermes/Mercury, the Wing-Footed Messenger; Castor and Pollux, the twins
Planetary Ruler: Mercury
Number: 5
Archetype: Messenger

Information from the book Astrological Secrets for the New Millennium by Laurie A. Baum, M.S.W. For full information on Gemini and the other signs, check this book out!