Is it possible to Uninstall Google App without root permissions ?
It consumes more internal memory and drains battery.
I already gone through a thread to disable it but uninstalling may free-up some space and saves battery.
It's not just about Google apps. You can't remove any system app without root privileges. The reason is very simple. You need higher privileges (system; root) to write the
system partition which contains those system apps and you don't have it.
system partition is mounted in read-only mode by-default.
Unless that partition is already mounted in read-write mode, a system app uninstaller would first have to remount the partition in read-write mode and then would begin the procedure of removing the app. To remount, they require root permissions while you're asking something impossible here.
Thinking about adb wouldn't help here because it doesn't have the privilege to remount that partition too.
As for freeing some disk space, know that disabling those Google apps and clearing their data from Settings → Apps → All apps should be enough because even if you somehow end up achieving the impossible, you won't be able to see any difference since the insufficient-memory issue is associated with
data partition, not with
See Where in the file system are applications installed?
As for any concern about the battery, you may be able to save some juice using Greenify.