He secured his place on the European Tour by finishing fifth on the Challenge Tour Rankings in 1998 and then had 17 unbroken years on the DP World Tour, winning four times with a career-best finish of 25th in the Race to Dubai in 2001. His victories came in the 2001 Omega European Master, 2003 Open de Madrid, 2004 Open de Sevila and 2009 SAS Masters. Gonzalez would also narrowly miss out on the 2013 Jonnie Walker Championship at Gleneagles after defeat in a play-off against Tommy Fleetwood and Stephen Gallacher.
After losing his card at the end of the 2015 season, he became the oldest ever European Tour Qualifying School graduate when he earned a card in 2016 aged 47 years and 24 days.
Gonzalez became a member of the Legends Tour in 2021 and clinched his first Legends Tour title in the 2022 Italian Senior Open at Argentario Golf & Wellness Resort by a three-shot victory over James Kingston.