Guilherme do Prado Raymundo (known as "Guly") is a Brazilian footballer. He currently plays for English club, Southampton, after signing permanently on a two and half year deal after being on loan from Cesena.

Do Prado started his career at Portuguesa Santista. He was later signed by Serie B club Catania on August 2002, making his debut on 31 August 2002 in a game against Siena. He was later signed by Perugia (at that time belonging to Luciano Gaucci, who was also the majority shareholder of Catania), where he had the chance to make his debut in the Italian top flight.

In 2005, following the cancellation of Perugia from Italian football, he found himself without a club, being then signed by Fiorentina. However, due to a career-threatening injury, he never played a single match for the viola, and was subsequently loaned out twice, to Serie B clubs Spezia (from January to December 2007) and Mantova (from January to June 2008).

On July 2008, Do Prado agreed to leave Fiorentina by mutual consent. On September 2008 he initially agreed a contract with Messina in the Serie D,[citation needed] but later renounced to join the Sicilian side and instead accepted an offer from Pro Patria of Lega Pro Prima Divisione. In the 2009 summer window he joined newly-promoted Serie B outfit Cesena and was part of the side that finished as runners-up, thus gaining promotion to Serie A.

On 23 August 2010, Southampton signed Do Prado on a five month loan deal until January with an option to make the deal permanent when the next transfer window opens at the turn of the year. He made his début in a 4–0 victory away at Bristol Rovers, replacing Morgan Schneiderlin in the 84th minute. His first goal came in a 1–1 draw away at Yeovil Town. Guly put in a "Man Of The Match" performance in the home game against Tranmere Rovers by setting up a goal and showing unique skill to control the game. He scored his second goal in a 4–1 victory against Peterborough United. He grabbed a brace in a 4–0 win over Exeter City. He then scored a match later in their 3–1 victory over Dagenham and Redbridge. He then made it four goals in 8 days by scoring a thirty yard piledriver in the FA Cup at home to Premiership side Blackpool to win 2–0. His run of form continued with another goal in Southampton's 6–0 victory against Oldham Athletic. He signed permanently on 20 January 2011 on a two and a half year deal. His first goal since making the move permanent came in a 2-0 victory over Charlton Athletic. His 10th goal of the season came in a 1-0 victory over Bristol Rovers.