Treschow was an important industrial pioneer who founded several companies in Christiania and he was one of the first Norwegians to produce large-scale paper.
After attending the University of Utrecht, he was appointed as a tax collector in Christiania (now Oslo) Norway in 1683.
[3][4] Between 1693 and 1694, Gerhard Treschow began to collaborate with Ole Bentsen (1653–1734) who had a 15-year royal charter to create a paper mill at Christiania.
[7] His son, Justus Gotthard Treschow, (1692–1730) took over management of his father's business interests.
His daughter Catharine (1690–1727) married Johannes Trellund (1669–1735) who was Bishop of the Diocese of Viborg.