Gmail for Android application receives an update on Android 4.1 devices or higher. The update is intended to save us time while we reply, archive and search within the app. Once updated to the latest version the app lets you reply and archive messages right from notifications bar with one quick tap. Cool isn’t it?
Users can also customize the app to notify on specific messages from specific persons. Lets say you want to filter all the messages from your mom,wife or girlfriend, you could set a certain ringtone so that you’ll know who’s emailing you the second the email lands in your inbox (notification bar) and then quickly reply straight from there.
It probably doesnt make sense to link to Play store as all Android devices get the Gmail app by default, but anyways here you can find the app on Play store.