According to a report in Android Police, Gmail Android app version number 4.2 is going to bring both these features to Android devices. This version will also allow users to mark mails as "phishing".
Similar to what Android users do in maps or browser, you can easily pinch-to-zoom in the mail text or image to view it clearly. The swipe support is also same as we have seen in notification bar; you can simple swipe an email message away to trash or archive now and if you accidentally do this, there is small undo button also present to save from any mishaps.The swipe functionality will also be configurable, so you set it to archive, delete or just remove the existing label from an email.
There is no word on when we are going to see this app version rolled-out in Google Play. There is no official evidence either to support what Android Police is saying.
We will have to wait to see if Google really brings the pinch-to-zoom and swipe support to Gmail Android app.