If you use Chrome, you can create a shortcut that looks and acts like a dedicated desktop app. Open Google Chrome and log into your Gmail account.
Having the Gmail icon right on your desktop saves you from opening a browser and typing a URL every time you want to check your messages. Since Google doesn't provide a traditional "installer" for Gmail on Windows or Mac, you have to create a shortcut using your web browser. how to get gmail icon on desktop
Below are methods for both.