Technically, and legally, speaking, the GUBment can get access to any data if it isn't air-gaped and encrypted.
I'm legitimately curious as to why you only learned this only today. We've known that governments have been taking data like this from companies for a long time. All access that Google has is pretty much up for the government to grab.
Anything "in the cloud" also known as other people's computers is fair game for the government right now.