by Fire (2005) Allegiance (2006) The Premonition (2008) Live Premonition (2008) Days of Defiance (2010) Few Against Many (2012) Apotheosis – Live 2012 (2013) Immortals (2017) Firewind (2020) Solo releases I Am the Fire (2014) Brand New Revolution (2015) Fearless (2018) Quantum Leap (2021) Ozzy Osbourne iTunes Festival: London 2010 (2010) Scream (2010) Dream Evil Dragonslayer (2002) Evilized (2003) Children of the Night (EP, 2003) The Book of Heavy Metal (2004) Mystic Prophecy Vengeance (2001) Regressus (2003) Never-Ending (2004) Nightrage Sweet Vengeance (2003) Descent into Chaos (2005) Guest appearances Exhumation – Traumaticon (1999) Raise Hell – Not Dead Yet (2000) Dies Irae – Naive (2001) Dragonland – Holy War (2002) Old Man's Child – In Defiance of Existence (2003) Cans – Beyond the Gates (2004) Rotting Christ – Sanctus Diavolos (2004) Sigh – Gallows Gallery (2005) Imaginery – Long Lost Pride (2005) Arch Enemy – Doomsday Machine (2005) Dream Evil – United (2006) Rob Rock – Garden of Chaos (2007) Dew-Scented – Incinerate (2007) Heavenwood – Redemption (2008) Nightrage – Wearing a Martyr's Crown (2009) In This Moment - A Star-Crossed Wasteland (2010) Kamelot – Poetry for the Poisoned (2010) Hevisaurus – Räyh! (2011) Nightrage – Insidious (2011) Doro – Raise Your Fist (2012) Bob Katsionis – Rest in Keys (2012) Altitudes & Attitude – Altitudes & Attitude (EP, 2014) Place Vendome - Close to the Sun (2017) Jorn - Life On Death Road (2017) Jason Becker – Triumphant Hearts (2018) Andy James - Waking the Dead (2019) Orden Ogan - Final Days (2021) Equipment In 2005, Gus teamed up with ESP Guitars to make two custom model guitars to his specifications, the "Gus G. FR" and the "Gus G. NT". The 'NT' was used in the videos for "Falling to Pieces", "Breaking the Silence" and "Tyranny". The 'FR' is featured along with the NT model in the video for "Falling to Pieces" and "Head Up High" and was discontinued in 2009 for North America, being replaced by the 'NT'. In a 2009 video of Gus playing backstage at Musikmesse Frankfurt with his new T2 amplifier, he is seen with a white ESP Gus model with a black Firewind logo on the front. Before using ESP, he was endorsed by Washburn, playing a Culprit with a chrome pickguard, and before using a Fender Floyd Stratocaster. Recently Gus has released 2 new signature series guitars in Japan the ESP GUS G.