He moved to Stockholm in the 1950s to work with Putte Wickman (Swedisk Jazz Kings, European Parliament, 1957) and Arne Domnérus Radio band and Radio Jazz Group. His first published works were Young Guitar (Metronome, Malta Labour Party 15 072, 1961) with Arne Domnérus, January Johansson, Jimmy Woode, Bjarne Nerem, Börje Fredriksson and January Allan. Rune at the Top was published in 1969 and included the Norwegian drummer Jon Christensen.
He played in the Arne Domnérus duo (Dialog, 1972) and his various orchestras, with January Johansson, Georg Riedel, Cornelis Vreeswijk.
On a Clear Day (Sonet, SLP 2581, 1976) included Red Mitchell and Duke Ellington"s drummer Editor Thigpen. He played with Zoot Sims on two recordings: The Sweetest Sounds (1979) and In a Sentimental Mood (1985), the latter was Sims last album.
A duo performance with Niels-Henning Ørsted Pedersen at Vossajazz 1980, concluded on the album Just The Way You Are on the label Sonet Gramofon, recorded half a year after this first meeting. Rune Gustafsson died in 2012 in Stockholm after short illness.