Paijkull, previously Gunilla Karlsson, was a football player with the Stockholm club AIK. In 1971, she was one of three AIK players called–up for an unofficial Sweden team's friendly match against Denmark in Copenhagen.[1]
She began playing with Hammarby IF DFF in 1973[2] and was appointed head coach of the team in 1978.[3]
Paijkull took over as Sweden women's national team coach in 1988, ahead of the 1988 FIFA Women's Invitation Tournament in which Sweden finished runners–up to Norway. She was the first woman to coach a national football team.[4] At the inaugural 1991 FIFA Women's World Cup in China, Paijkull, the only female coach among the 12 finalists, guided Sweden to a third–place finish.[5] She was also the first female manager to defeat a male manager in a World Cup match.[6]
After leaving her position as national team coach Paijkull became a FIFA instructor.[7] She served on FIFA's technical study group at the 1996 Atlanta Olympics, as well as at the 1995 and 1999 editions of the FIFA Women's World Cup.