Folke Gunnar Mueller (born 5 January 1948) is a Swedish professional golfer, who formerly played on the European Tour and the Asian Golf Circuit.

[4] He won one of the three major amateur tournaments at the time in Sweden, the 1971 Scandinavian International Match Play Championship, beating Henry Knudsen, Denmark in the final 4 and 3.

He was also first Swedish player to qualify for all four rounds in The Open Championship, an achievement reached in 1973, at Royal Troon Golf Club, Scotland.

He led the final Swedish PGA Order of Merit in 1981, but did not play in the World Cup that year, as there was no tournament for the first time since its inauguration in 1953.

[5] After the start of the Swedish Golf Tour in 1984, Mueller played a few tournaments in his home country, with a best finish of 2nd at the 1985 Gevalia Open in Gävle.