Avenged Sevenfold

Gates was featured on the EP Warmness on the Soul, which contains select songs from the first album as well as his new version of "To End the Rapture". His name on the EP was written as "Synyster Gaytes".

On the Avenged Sevenfold DVD All Excess, Gates claimed that his name was created on a drunken drive through the park with The Rev.

Gates was voted Sexiest Male in the 2008 Kerrang! Readers Poll. In 2010, Guitar World listed him as one of the 30 greatest shredders of all time. They described him as being able to perform finger-twisting licks, acrobatic sweeps, devilish chromatics and towering dual-harmonies. Gates was chosen as one of Guitar Hero's 50 fastest guitarists. On Guitar World's 2010 Readers Poll, Gates was chosen Snappiest Dresser and the Best Metal Guitarist. Rock One Magazine's 2010 Readers Poll voted Gates the No. 3 best musician in the industry. On April 20, 2011, Gates won the Revolver Golden God award for Best Guitarist along with bandmate Zacky Vengeance. Avenged Sevenfold picked up numerous other awards and delivered the headlining performance of the night.^[5]

In the special edition of Revolver magazine that was released the same day as the Nightmare album, Gates stated that he originally started out writing the song "So Far Away" in honor of his grandfather. However, the song is now primarily about his former bandmate, best friend and previous drummer of Avenged Sevenfold, The Rev,^[6] who died on December 28, 2009.

Pinkly Smooth

Gates and The Rev played in an experimental metal band named Pinkly Smooth. Formed in the summer of 2001 in Huntington Beach, California, the band featured ex-Ballistico members Buck Silverspur on bass and D-Rock on drums. The band released one album, Unfortunate Snort on Bucktan Records, which features a crossover sound of mostly punk, ska and progressive metal. Former Avenged Sevenfold bassist Justin Sane played keyboards and piano on the album. There was speculation that Pinkly Smooth was going to produce another record, but due to the death of the Rev, it is highly unlikely that they will produce any more material. However, Gates has said that he would consider remastering the tracks from Unfortunate Snort and re-releasing the album.^[6]

With Avenged Sevenfold

• Sounding the Seventh Trumpet (2001) (only on the re-release version of "To End the Rapture")
• Waking the Fallen (2003)
• City of Evil (2005)
• Avenged Sevenfold (2007)
• Nightmare (2010)
• Hail to the King (2013)
• The Stage (2016)
• Life Is But a Dream... (2023)

With Pinkly Smooth

• Unfortunate Snort (2001)

Featured guest appearances

• Bleeding Through's "Savior, Saint, Salvation," track (with M. Shadows).
• Good Charlotte's "The River" track and music video (with M. Shadows).
• Burn Halo's "Dirty Little Girl" track and music video.
• Burn Halo's "Anejo" track.
• Brian Haner's "Blow-Up Doll" music video.
• The Jeff Dunham Show intro song (with his father).
• AxeWound's "Vultures" from their debut album of the same name.
• Machine Gun Kelly's "Save Me" from the album Lace Up (with M. Shadows).
• Linkin Park's "Faint" live at Chester Bennington's memorial concert (with M. Shadows).