To add the ChatGPT extension to your Google Sheets, you can follow these steps:
Open a new Google Sheets spreadsheet on your computer. Click on Extensions > Add-ons > Get Add-ons. You should be taken to the Google Workspace Marketplace. Locate the search bar in the top right corner of the page and type "ChatGPT." Select the first option that appears and install this extension. After installation, enable ChatGPT integration into Google Sheets by making an account on the OpenAI platform and getting your API key. OpenAI API after login or Signup - API keys - OpenAI API