How much is Gemini for Gmail?

Excuse me, could you please clarify what you mean by "Gemini for Gmail"? Are you referring to a specific service, integration, or perhaps a misunderstanding of the terms? Gemini is a popular cryptocurrency exchange platform, whereas Gmail is a widely used email service by Google. There's no direct connection between the two, so I'm a bit puzzled by your question. Could you elaborate on what you're trying to inquire about? Is there a specific service or integration you're looking for that might involve both Gemini and Gmail?