If you disable the apps that you don't use and delete the data of this apps the space that they use is almost negligible.
Anyway what you wanna do is possible but i don't recommend it because i didn't try it.
Go to settings, about phone and tap build number 7 times consecutive until you see a message saying "you are now a developer".
Go to settings, developer, and in the botton is an options that says something like "Force all apps to external storage ignoring android manifest". Activate that option. You need your sd card to be set as internal storage and not as portable external storage.
Now you should be able to move all apps you want to the sd card including the google apps.