Is there a way to manipulate GPS data?

[schettj]

It's a company phone. Turn it off, or leave it on in your home when you are off. Me, I'd turn it off.

You cannot override the location reporting between the phone and the tower, that's used for e911 and happens (one would hope) at the radio level. You *can* stop it by turning off the phone. Or putting it in flight mode. You can also physically place the phone wherever you want to draw your boss. A dumpster in a really bad neighborhood comes to mind.