There are multiple artists with this name:

1) Infernal Gates was a melodic death metal band founded in 1992 by Stefan Sundholm (vocals, keyboards), Anders Hagerborn (bass) and Jonas Gustafsson (drums). The line-up was completed later that same year when Johan Hedman (guitar) and Jan-Åke Österberg (guitar) joined the band. Their style has been described as "Atmospheric and melodic mid-tempo death metal with a mix of folk / emotional dark romanticism".

1993 - In Sadness... (demo)
1994 - The Gathering of Tears (demo)
1997 - From the Mist of Dark Waters (full-length)
1999 - When Angels Fell (demo)

2) Infernal Gates is a black metal babd from Montreal, Québec, Canada. Bandcamp page: https://infernalgates.bandcamp.com Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.