system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How did Republican Officers react to Order 66?

Because they had no chip inside of them when the order was sent out, did they just support their clone troopers below them when they decided to execute their Jedi Generals, who were considered the Republican Officers' friends of nearly the same rank?  Wouldn't this have confused the Rep Officers?

Or, did high ranking Officers with a security clearance know of Order 66?
gpt
Considering there ended up being a substantial presence of former Republic Military within the Rebel Alliance, i would hazard a guess that many of them didn't take too well to the order. 

Ultimately, it's probably going to run a wide spectrum of reactions. Some may oppose the decision, but considering how deeply entrenched Palpatine was by that point, they would be quelled pretty quickly. Others would fear for their own safety and, while they would object, they'd keep quiet. Others wouldn't care. And some may even see it as room for personal advancement.