what's the secret to a great relationship between a Gemini and pisces?
Having a relationship based on reality and not based on the stars. Its a pseudoscience!
Don't go with astrology, it makes no sense. Base your relationship off of personality.
The answer does not lie with the stars(outward); but inward... Like Shakespeare said; "The fault dear Brutus in not in the stars; but in ourselves.....".
Make sure Pisces doesn't cheat on Gemini with his/her twin.