Born in Barcelona, Catalonia, Gómez emerged through FC Barcelona's youth ranks, and played once for the first team in competitive games, coming on for Thiago Motta in the 68th minute of a 6–0 win against Zamora CF for the Copa del Rey, on 11 January 2006. Gómez completed his formation with neighbours RCD Espanyol, and made his official debut with the latter in a 0–4 away defeat to Real Murcia on 23 March 2008. He appeared in a further two La Liga matches during his tenure, always as a second-half substitute.
On 6 June 2008, Gómez signed for Swansea City of the Football League Championship on a season-long loan, for a fee of £200,000– teammate Albert Serrán also made the move, albeit in a permanent situation. He scored the winning goal with a deflected direct free kick against rivals Cardiff City on 23 September, in the first South Wales derby for seven years. Gómez was described by scouts as having "a lovely ability to receive the ball in space or if he is marked tightly, find space after his first touch". Whilst on loan, reports surfaced that Swansea wanted to sign him permanently and other teams were supposedly interested in acquiring his services, but nothing came of it, as manager Roberto Martínez eventually announced the club would not be able to retain the player due to his high price tag.
Wigan Athletic
Gómez finished the season with 14 goals in all competitions and returned to Espanyol, being immediately sold to Premier League side Wigan Athletic on a three-year contract on 19 June 2009, with the transfer fee estimated to be in the region of £1.7 million – the move also meant he would be reunited with former Swansea boss, countryman Martínez. He made his debut in a 2–0 victory over Aston Villa on 15 August, and netted his first goal for the club against Birmingham City on 5 December, albeit in a 2–3 home loss. Gómez scored his second league goal in a 2–0 win against Wolverhampton Wanderers on 2 October 2010. However, during the match, he escaped suffering a leg injury after a challenge from Karl Henry. On 17 December 2011, Gómez scored the equaliser for hosting Wigan in a 1–1 draw against Chelsea, his fourth goal in five league games. He netted the second goal at Arsenal in the eighth minute of an eventual 2–1 away win on 16 April 2012 at the Emirates Stadium, and the Latics once again managed to avoid relegation. On 28 August 2012, Gómez scored once as Wigan defeated Nottingham Forest 4–1 away to reach the third round of the Football League Cup. On 24 November he netted a hat-trick to help his club win 3–2 at home against Reading at the DW Stadium, becoming just the second Spaniard to achieve the feat in the Premier League after Fernando Torres. On 9 March 2013, Gómez provided the cross from which Maynor Figueroa opened the scoring at Everton for the season's FA Cup, and he himself added the final 3–0 for his team's third goal in as many minutes, in an eventual qualification to the competition semi-finals. He helped the club win the domestic cup, being replaced after 81 minutes by Ben Watson, who went on to score the winning goal; however, only three days later, with him on the pitch again, Wigan were relegated from the top division following a 1–4 away defeat to Arsenal. Gómez remained at Wigan for their first season back in the Championship, and also took part in the club's inaugural campaign in the UEFA Europa League. On 12 December 2013, in the last group stage match, he scored a penalty kick to put his team ahead at NK Maribor, but the Slovene won 2–1 to eliminate their opponent.
On 29 May 2014, Gómez signed a three-year contract with Sunderland on a free transfer after his contract at Wigan expired. He made his debut on 16 August, coming on as a 68th-minute substitute for Jack Rodwell in a 2–2 draw away to West Bromwich Albion, and scored his first goal 11 days later August in a 3–0 League Cup second round success at Birmingham City. Gómez scored his first league goal for his new team on 3 November, the second in a 3–1 away win over Crystal Palace. His third goal of the campaign came on 13 December, where he scored a penalty to open the scoring in a 1–1 draw at home to West Ham United. On 3 February 2015, Gómez netted another penalty in a 3–1 win at Fulham in an FA Cup fourth round replay. On 2 May, again from 12 yards, he scored once in each half as the Black Cats defeated Southampton 2–1 at the Stadium of Light. The following week, his shot was deflected in by Danny Graham, to give the latter his first Sunderland goal, in a 2–0 away success over Everton; still in that month, he was ruled out for the last three games of the season with a fractured kneecap. In the last minutes of the 2016 winter transfer window, after making only six appearances in the first half of the season, Gómez was loaned to Championship club Blackburn Rovers until June. He scored in his debut on 6 February, helping to a 1–1 draw at Middlesbrough. Three weeks later he netted twice, including a last-minute winner from a 30-yard free kick in a 3–2 victory against Milton Keynes Dons at Ewood Park.
