Employees? Only the ones that are narcissists and want to show how intelligent they are and look down on others...
In all my jobs, GPA has never come up among coworkers.
On the other hand, employeRs are a different matter. In those cases, it really depends on the job/HR person. Some are more anal than others in the job requirements (they're going through a checklist). If the job request doesn't list a GPA as a requirement, all they're checking is that you have a degree. If you have no work experience, it's good to list a GPA if you have one, otherwise, it can be a liability (if you are lieing).
Some companies do a background check (or it may be checked at some later point). If you say you have a BS in Computer Science with a 3.9 GPA, and you actually had a 3.0 (or a 3.
, you are screwed since you gave the info and it didn't match. If you just say you had a BS in Computer Science, you are fine.
One caveat, if you are going for some high demand, low supply job, that needs a certain amount of intelligence, and you have a good GPA, it may be wise to include because you are trying to differentiate yourself from the crowd. I've never run into it as an issue though.