In 1842 he resigned from the mission and became an advisor and translator to King Kamehameha III. He also became involved in the civil concerns of the islands, and was the King’s Minister of Foreign Affairs from November 1843 to March 1845, Minister of Interior from March 1845 to February 1846, Minister of Finance from April 1846 to September 1853, and in the House of Representatives from 1858 to 1859. He was commissioned in 1849 as Minister Plenipotentiary to England, France and the United States. He was one of the founders of the Punahou School for children of the missionaries in 1841. He founded Hawaii's first medical school in 1870, and was the author of one of the first medical texts written in Hawaiian, Anatomia : he palapala ia e hoike ai i ke ano o ko ke kanaka kino, in 1838. In 1850 Judd purchased from King Kamehameha the land which became the Kualoa Ranch on the Windward Coast of Oahu. His descendants still own and operate the ranch today. Judd died July 12, 1873 in Honolulu and was buried in the Oahu Cemetery.
Family
Judd and his wife Laura had nine children:
Gerrit Parmele II born March 8, 1829, died November 13, 1839, buried in Oahu Cemetery.
Helen Seymour born August 27, 1833 and died April 2, 1911.
Charles Hastings born September 8, 1835 died April 18, 1890. Married November 1, 1859 to Emily Catherine Cutts, four children. Worked in the Guano and farming businesses, and held several posts in the Kingdom.
Laura Fish born September 8, 1835 died November 22, 1888 at San Francisco, California. Married February 22, 1861 to Joshua Gill Dickson, four children.
Albert Francis born January 7, 1838 died May 20, 1900. Married April 4, 1872 to Agnes Hall Boyd nine children. Last child Lawrence M. Judd became Governor of the Territory of Hawaii in 1929–1934.
Alan Wilkes born April 20, 1840 and died March 26, 1875.
Sybil Augusta born March 16, 1843 and died September 10, 1906. Married February 27, 1862 to Henry Alpheus Peirce Carter, seven children. Son Charles Lunt was a member of the Committee of Safety, and son George Robert was Governor of the Territory of Hawaii.
Juliet Isabelle born March 28, 1846 and died June 27, 1857.
Legacy
Judd's life was the basis of the novel The White King. A biography, Dr. Judd, Hawaii’s Friend which was written by his great-grandson Gerrit P. Judd IV and published in 1960. His papers were kept under restricted access at the Bishop Museum until his great-grandson Albert Francis Judd III died in 2006. Judd Street in Honolulu is named in his honour.