While there is no "official" Gmail desktop application made by Google for Windows 7, you can easily create a native-feeling desktop experience using modern workarounds.
The most reliable way to get a Gmail "app" on Windows 7 is by using Google Chrome to create a desktop shortcut that behaves like a standalone program.
: Ensure you are using the latest version of Chrome compatible with Windows 7 (Version 109 is the final supported version). Go to Gmail : Visit mail.google.com and log in. Create Shortcut : Click the three vertical dots in the top-right corner. Select Save and share or More tools .
Since Windows 7 is an older operating system, finding the right "app" requires a bit of savvy. Below is a guide on how to get a Gmail desktop interface for your 64-bit Windows 7 system for free.