Government base

This is where the government Spies are at the beginning of Scary-Oke, They are picking up signals which they "Hadn't seen in years" and are not surprised when they find out they are coming from Gravity Falls, Oregon.

Exterior

The Government headquarters has two big s satellites on the roof and appears to be somewhere in the dessert, given the sand and foliage. the terrain surrounding the building is somewhat mountainous.

Interior

The only pictures we see of the interior are of the screens that they look-up gravity falls on, and the screen that they pick up the signal on.