Gemini and Aquarius are the couple who have been together for years, but never seem to settle down. These two free spirits understand one another almost perfectly and complement one another in many ways. Gemini and Aquarius compatibility is strong and potentially long lasting too, in an unconventional way. For this couple, it’s all about the meeting of minds. Mental stimulation is vital for Gemini and Aquarius compatibility depends upon an intellectual match too. They can talk endlessly over wide ranging topics, and they will never run out of conversation with one another.