Elected an honorary member of the Romanian Academy in 1938, he was stripped membership in 1948 by the new communist regime. Gheorghiu was among the leading Romanian New Testament theologians. He wrote detailed works of introduction and exegesis on the subject, also publishing on Biblical chronology and theology. Close to a hundred of his studies, articles, sermons and reviews appeared in "Candela", and in two other newsletters late in his life. A series of commentaries on books of the New Testament remains in manuscript, as does his most important work, a critical edition of the entire New Testament. Other manuscripts were lost in 1940, during the Soviet occupation of Northern Bukovina. He died in Cut, Neamț County.