This is the closest "official" feel. It opens Gmail in its own window without browser tabs or an address bar. Go to mail.google.com and sign in. Click the three dots (top-right).
In conclusion, the existence of a Gmail Windows desktop app remains a "what if" scenario that underscores the evolution of software. While the web has become powerful enough to replace many desktop functions, the desire for a native Gmail experience proves that the desktop environment is far from obsolete. The ideal Gmail desktop app would offer the sleek interface and smart features of the web version with the offline capabilities, system integration, and resource efficiency of native software. Until Google shifts its philosophy to prioritize native integration over browser retention, Windows users will continue to juggle tabs, PWA shortcuts, and third-party clients in search of an email experience that feels truly at home on their desktops. gmail windows desktop app
– The article warns that third-party desktop apps that aren’t official Google products may have permission risks (full email access). The PWA, being just a wrapped website, is the safest alternative. This is the closest "official" feel
Instead of waiting for Google to release an official Gmail desktop app for Windows, tech writers and developers have realized that Progressive Web Apps (PWAs) and custom Chromium-based wrappers actually outperform what an official native app would likely do. Click the three dots (top-right)
With Microsoft and Apple offering deeply integrated mail apps, Windows users have long wanted a native Gmail app. This article points out that – the PWA – which many people don't even know exists.