Version 3.5.1 is now available and directly launch-able into GKE clusters running on Google Cloud.
In the marketplace entry (screenshot below) you will see that we track both the 3.4 and 3.5 release series on GKE - so deploying the 3.4 series will remain an option going forward, while 3.5 will become the new default.
As always, for documentation on our GKE entry, consult the following: