There are several ways to disable Gemini, including:
Turn off Gemini Apps Activity
Go to gemini.google.com
Click Activity
Click Turn off near the top
Select Turn off or Turn off and delete activity
Disable Gemini access to Google apps
Go to your Google Account settings
Navigate to the Security section
Locate Gemini under connected apps
Disable Gemini
Turn off Gemini for Google Cloud products
Go to the Admin for Gemini page in the Google Cloud console
Click Purchased products
Select the applicable billing account
Click Continue to the Admin for Gemini page
Select the Gemini subscription you want to turn off
Click Turn Off, then Confirm
Cancel Gemini for Google Workspace
Cancel your subscription
If you're on a monthly Flex Plan, canceling immediately stops further billing
If you're on an Annual/Fixed-Term Plan, you're still responsible for the full value of the commitment if you cancel before the contract is over
You can review your prompts, delete your Gemini Apps activity, and turn off Gemini Apps Activity in My Activity at any time.