Papachatzis was Professor of Administrative Law at Panteion University from 1943 to 1967 when he was dismissed from the Greek military junta of 1967–74. He was among the prominent Greek Professors of the first period of the Panteion University after its foundation in 1927, that contributed to the university's curriculum. He also served as Rector of the university from 1964 to 1965.
In 1929, he was accepted into the Council of State, upon that institution's establishment, having come second to Michail Stasinopoulos in the entrance examination among about 120 nominations for the ten positions of Auditors of the Council of State. He also served as the President of the Council of State's 2nd Department (1963-1968) and Vice President in 1969.
Among his publications is the supposed diary of Paul Amadeus Dienach initially in 1973 and later in 1979 under the title The Valley of the Roses along with various articles on its study.
- Panteion University: Πρυτανεία Γεωργίου Παπαχατζή Retrieved 30 June 2015
- National Documentation Center of Greece: openarchives.gr Συνεδρίαση XIX: 1 Ιουνίου 1932 Retrieved 6 February 2016
- Panteion University: 85 Years Retrieved 6 February 2016
- Panteion University: University Administration 1930-2011 Retrieved 9 March 2016
- Council of State of Greece: Former judges Retrieved 8 February 2016
- Council of State of Greece: Presidents of Departments Retrieved 8 February 2016
- Panteion University Library: Bibliography of Georgios Papachatzis[dead link] Retrieved 6 February 2016
- Papachatzis, Georges. "Traité de droit administratif en vigueur en Grèce." (1977): 335-335. Retrieved 6 February 2016
- Papachatzis, Georgios M. Systima tu ischyontos stin Ellada dioikitiku dikaiu. Eptalophos, 1976. Retrieved 6 February 2016
- Greek Index of Social Studies & Humanities: Georgios M. Papachatzis published articles Retrieved 6 February 2016
- Panteion University Publications "Pandemos" - Archives
- 1964-1965 Rectorate of Georgios Papachatzis: Doctorate degree awarding ceremony of Jean Lesage.
- Panteion University - 85 Years
- National Documentation Center of Greece - Session XIX: June 1 1932: Georgios Papachatzis PhD Award
- Bibliography of Georgios Papachatzis[dead link]
- Georgios Papachatzis published articles: http://www.grissh.gr/ Greek Index of Social Studies & Humanities: Georgios M. Papachatzis
- Parnassos Literature Magazine: Rare volumes