The key of this progression is D Major, shown by the G and A chords (IV and V are the only two major chords next to each other in the major scale). BUT, the central chord is G, so I'd think G Lydian (the notes of D Major, but focusing on G).
Another way to see the key is to look at the chords.
G = G, B, D
D = D, F#, A
A = A, C#, E
Bm = B, D, F#
Putting all of these notes together, you get G, A, B, C#, D, E, F#, or G Lydian.
"You must stab him in the heart with the Bone Saber of Zumacalis... well, you could stab him in the head or the lungs, too... and the saber, it probably doesn't have to be bone, just anything sharp lying around the house... you could poke him with a pillow and kill him."
- Aqua Teen Hunger Force, The Universal Re-Monster
- Aqua Teen Hunger Force, The Universal Re-Monster
