Since winning the Turner Prize in 1996 with Confessions of a Justified Sinner, Douglas Gordon (b. 1966) has lived in Germany, France, New York and Germany again. But in accent and attitude, he remains a Glaswegian. Those roots are being reaffirmed at the moment: as part of this year's Glasgow International Festival of Visual Art, one of Gordon's most celebrated works is back on display in the city where it was first shown.