What would happen if Google were hacked by hackers?

 

As much as it'd be difficult to hack Google, humans are prone to error

For that reason, Google has a Google Vulnerability Reward Program where hackers (Or any users who come across a vulnerability ) report security issues on Google’s Web products and get rewarded (You can imagine how much Google can reward you huh). So I believe hackers find loopholes in google products to date but instead of exposing them, they opt for the rewards. (I'd do the same, why book for a jail term when you can get rewarded instead)