I haven't worked on this app in a long time, which means it will be quite difficult for me just to get it to compile under the Play Store's new requirements. It is not trivial to update it.
So I am thinking of deprecating this app and instead recommending users to try using WebApps v4.0 or above, which now makes it easier to login to Google web apps. It is kept up to date and has much better features like support for logging in with multiple accounts, creating shortcuts to desktop, having multiple apps open at the same time, sharing to it, having your own list of apps instead of in-built ones, etc.
Since I no longer use Google products, I can't test it to see if there are problems with using WebApps for Google websites. Could users of GoogleApps please test WebApps and post back here with feedback on whether it works better or not? Thanks!