|Full name||Gonzalo Antonio Fierro Caniullán|
|Date of birth||21 March 1983|
|Place of birth||Santiago, Chile|
|Height||1.71 m (5 ft 7 1⁄2 in)|
|Playing position||Right back / Winger|
|* Senior club appearances and goals counted for the domestic league only and correct as of 5 December 2015.
‡ National team caps and goals correct as of 29 January 2015
Fierro began his career at Chilean giants Colo-Colo, being promoted to first-adult team in 2002. Along the seasons, he break into the first team and then he became an undisputed player with Claudio Borghi with whom won four league titles and reached a 2006 Copa Sudamericana runner-up, all of active way.
On 26 August 2008, Fierro joined Brazilian powerhouse Flamengo becoming the first Chilean player on join the club. Nevertheless, he only completed eight league games in his debut season. In 2009, Fierro had a more active role in the team after being chosen to replace Ibson who left the club on loan, playing 24 games and scoring one goal against 2008 Série A defending champions São Paulo in a 1–1 away draw. That season he helped Flamengo to win the Brasileirão.
On 15 July 2010, was reported that Fierro joined Boca Juniors in an alleged request of Claudio Borghi to the club board. However a serious injury stopped his incorporation and on 17 August it was confirmed that he left the club for return to Rio de Janeiro with Flamengo and start his recuperation.
In 2012, Fierro returned to Colo-Colo. Following Pablo Contreras departure, he became the club’s captain and in 2014 he was part of the Torneo Clausura team champion, where he was an undisputed player.
In 2006, he received his first international cap and debuted against Colombia on 16 August. The following year he was included in Chile’s squad for the 2007 Copa América. On 30 January 2008, he scored his first international goal during a game against South Korea where scored the only one goal of the game in a 1–0 win over the Asians.
Frequently called up by Marcelo Bielsa for the 2010 World Cup qualification, he was chosen into Chile’s list of 23 to face South Africa’s World Cup. On 9 June, prior Group H opening game against Honduras, Chile played an unofficial friendly against New Zealand where Fierro scored the second goal of his country’s 2–0 victory.
|1||30 January 2008||Seoul World Cup Stadium, Seoul, South Korea||South Korea||0–1||0–1||Friendly|
|2||9 June 2010||Kanyamazane Stadium, Mpumalanga, South Africa||New Zealand||0–1||0–2||Friendly|
- Chilean Primera División (7): 2002–C, 2006–A, 2006–C, 2007–A, 2007–C, 2014–C, 2015–A
- Copa Sudamericana: Runner-up 2006
- Copa Chile: 2016
- "Flamengo contrata atacante chileno Fierro" (in Portuguese). Folha Online. 26 August 2008. Retrieved 26 August 2008.
- Estrangeiros do Flamengo (in Portuguese). Flapédia
- "Motivado por telefonema especial, Fierro teme comparação com Ibson" (in Portuguese). Globoesporte.com. Retrieved 5 December 2015.
- "Fla-Flu decidido no fim garante novo confronto entre os rivais nas semifinais" (in Portuguese). Globoesporte.com. 5 March 2009. Retrieved 5 March 2009.
- Cuca aposta no chileno Fierro no Flamengo contra o São Paulo (in Portuguese) espn.com.br.
- Na volta do Imperador ao Morumbi, São Paulo reage e empata com o Flamengo (in Portuguese). Globoesporte.com.
- "Gonzalo Fierro, la sexta incorporación de Boca" (in Spanish). La Nación (Argentina). 15 July 2010. Retrieved 5 December 2015.
- "Definitivamente Gonzalo Fierro no será jugador de Boca Juniors". Emol.com (in Spanish). 17 August 2010. Retrieved 5 December 2015.