In his début season he was runner up in two tournaments, the Jazztel Open de España en Andalucía and the Omega European Masters, and finished in 46th place on the Order of Merit.

Despite that, he missed out on the Sir Henry Cotton Rookie of the Year award, which went to Gonzalo Fernández-Castaño of Spain.

In subsequent seasons, he was unable to consistently produce those same high levels of performance, and lost his place on the European Tour in 2007.

In 2009, Gustafsson won the Abierto Internacional de Golf Copa Antioquia, the opening event of the Tour de las Américas season, in Colombia, coming from behind in the final round to claim victory by one stroke.

[1] He rounded off the season with top five finishes in both the Argentine Masters and the Argentine Open as he ended the year as winner of the Tour de las Américas Order of Merit for 2009.