Gunilla Grubb was daughter of the Stockholm merchant Michael Grubb and his wife Catharina Sohm. In 1716 she married her cousin Nils Grubb and had five children.
Gunilla Grubb, who had contact with radical pietist and Moravian Church circles and wrote a number of hymns in Andeliga Wijsor of 1739 and in Sions Sånger, 1743, is an example of the prominent role played by women in the new pietist revival movement.
