Country of origin: Sweden Location: Uppsala, Uppsala Status: Active Formed in: 2015 Genre: Thrash/Death Metal Lyrical themes: War, Struggles, Dystopia, Society Current label: Unsigned/independent Years active: 2015-present The band was formed by the brothers Theo and Alex Härkesjö. The band name references a (possible) synonym for Gastornis, a genus of large flightless birds that lived during the late Paleocene and Eocene.