You cannot download a dedicated Gmail app for macOS because Google has never built one. Unlike Android or iOS, where Gmail exists as a standalone application, Google intends for Mac users to access their email through a web browser or by integrating Gmail into the native macOS Mail app.
Apple provides a built-in solution that allows you to manage Gmail without a browser. This is the closest "native" experience you can get. Click the Apple menu and select System Settings. Go to Internet Accounts. Click Add Account and select Google. Follow the prompts to sign in and authenticate. Ensure the "Mail" toggle is turned on. why can't i download gmail on my macbook
Airmail: Offers extensive customization and integration with other productivity tools. You cannot download a dedicated Gmail app for
Mimestream: Built by a former Apple engineer, this app uses the Gmail API to provide a lightning-fast, native Mac experience. This is the closest "native" experience you can get
Spark: Known for its "Smart Inbox" which categorizes emails automatically.