Can you opt out of Google Gemini?

Can you please clarify for me if there's a way to opt out of Google Gemini? I've heard some mixed information about this and I'm curious to know if it's possible to avoid being part of this program or if there are any steps I can take to manage my privacy settings in relation to it. Is it something that's automatically applied to all Google users, or is there a way to control my participation? I'd appreciate any insight you can provide on this topic.