Gmail update allows you to take action from your notification screen
With the update for Android 4.1+ or higher, you will still be able to use current notification features and customize which messages you receive notifications from and you can still set up custom notification sounds for certain emails. Those with Android 4.0 and higher will have faster search and better search suggestions so messages can be found quickly whether you are online or offline.
You can find the updated Gmail app at the Google Play Store.
source: Google via AndroidCentral