The Black Cats broke the British record for the highest fee for a goalkeeper when then-manager Roy Keane paid Hearts £9million for the Scotland international in 2007.
However, he made just 95 appearances in five years and joins fellow stoppers Trevor Carson and Lewis King, defenders Liam Bagnall and Jordan Lavender, midfielders James Brace and Brett Elliott as well as strikers Jordan Cook and Oumare Tounkara out of the exit door.
A succession of injuries and inconsistent form contributed to Gordon failing to fulfil his potential at the Stadium of Light.
He broke his arm twice, and suffered niggling injuries on a constant basis, while a knee tendon and anterior cruciate ligament injury picked up in April last year meant he was ruled out for eight months.
Belgian Simon Mignolet has established himself as the first-choice goalkeeper in Gordon's absence with Keiren Westwood, signed last summer as a result of Gordon's injury woes, understudy.
Gordon made just one appearance all season - against Bolton last month - and boss Martin O'Neill has decided the Scot, who has represented his country on 40 occasions, no longer figures in his plans.
Meanwhile, Nicklas Bendtner, Wayne Bridge and Sotirios Kyrgiakos have all returned to their parent clubs after loan spells.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.