Københavns Amt
He was married in 1930 to Grete Søegaard (1908-1996). His brother Anders Gudmundsen-Holmgreen (1892-1967) was also an artist. His son Pelle Gudmundsen-Holmgreen (1932–2016) was a composer. He died at Copenhagen County Hospital in Gentofte. His interment was at Solbjerg Park Cemetery in Frederiksberg.