[Bad HAL 9000]

Yea, wow.

Usage indoors?

Here is a tiny lesson in radio theory.

All GPS systems work in between 1.1ghz and 1.6ghz.

The higher the frequency the harder it is for it to penetrate solid matter. This is a basic rule of thumb for all radio systems, you need a clear line of sight for it to operate properly. (There are exceptions, like using tropospheric scatter, ionsphere reflection, etc. But these methods are not palatable for ghz range freqencies)

Now, since GPS works by looking at satellites, which are several miles above the planet you obviously need to be able to see the sky. It is pretty hard to see the sky through a solid roof in a home or workplace.

Long story short, you need to be outside for GPS to work well. Car roofs are very thin compared to the roof of a house and the GPS signal can penetrate that fairly easily. You would probably notice a difference in lock times though from moving in or out of your car.