Computer Configuration > Administrative Templates > Google Chrome > Generative AI
Both
HKLM\Software\Policies\Google\Chrome
This setting allows Gemini app integrations. 0/unset = Gemini integration will be available for users. 1 = Gemini integration will not be available for users. If the policy is unset, its behavior is determined by the GenAiDefaultSettings policy. For more information, please check the Help Center article https://support.google.com/chrome/a?p=gemini_in_chrome.