Gaming "Objectives and Key Results" type evaluations is far older than Google. It's not remotely an objective measure unless you have an organization that has
extensive knowledge of how to accurately assess effort based on set objectives.
From what I've seen, many organizations that try to formalize evaluations this way are easier to game, because the very idea that there are somewhat reliable metrics makes it easier to justify not following up as closely.
(I'm not saying it will happen, but I've seen it far more often than I care to; including once having a manager that didn't even inquire about what my team had done lately for three years - I didn't mind, I delivered what I should to other parts of the business, but he should have: he had no effective oversight over a team officially reporting to him that handled tens of millions in revenue; if I had messed up, his head would've been on the chopping block next to mine)