Windows 10 comes with a pre-installed "Mail" app that is quite capable and syncs perfectly with the Windows Calendar.
Windows 10 includes a built-in Mail app that supports Gmail via IMAP. gmail desktop app windows 10
Confirm the installation. The Gmail window will launch independently of the browser. Native Windows Alternatives Where can I download Gmail App for Windows - Google Help Windows 10 comes with a pre-installed "Mail" app
Power users who need advanced scheduling, snoozing, and tracking features. gmail desktop app windows 10
Would you like step-by-step instructions for any of these methods?