It is now easier to use Gmail on iPhone with its latest update. The app now makes it easier to interact with emails from the lock screen. You can now reply or archive a message from there. It is also easier and quicker to share and view attachments. You can now send a link, file, or photo right within the app you’re using. You can select Gmail from the share menu. Also, when opening attachments you can select which app you want to open them in.
Source: Mashable