There are multiple artists using the this name: 1) GOG is a Brazillian rap act. 2) Gog is crushing doom drone. From the label: "Sounds of Battle and Souvenir Collecting is dedicated to experimental, drug/metal, art-doom, and drone. We're out to create our own musical universe..."
http://myspace.com/soundsofbattlesouvenircollecting 3) Gog is a black metal band from Bolivia. 4) Gog is a power/heavy metal band from Mexico.

Read more about Gog on Last.fm.