In 1951, when Hussein Ala became Prime Minister, he proposed the position of Minister of Roads and Communications to General Hasan Arfa. General Arfa in turn asked Colonel Mikeladze to join him in this endeavor. During his later years in life, Grigor Mikeladze retired from the Army and joined the private sector. Prince Grigor married a Georgian belle by the name of Yelena (Lola) KhanPira (1900–1932). He had four daughters, Irina Mikeladze, Pariani (1925–1987), Moora Mikeladze, Parsa (1927–2008), Eya Mikeladze, Toossi (1929- ) and Etery Mikeladze, Shartooni (1920–1957). Grigor Mikeladze died of a heart attack in 1955. For all his services to the country the Iranian Army provided Colonel Mikeladze a full military ceremony with horse-drawn carriages and cannons. He was buried with full military honor. Both Grigor and Yelena Mikeladze (Khan Pira) are buried in Doulab Cemetery, the Christian cemetery which is in a beautiful garden shaded by big trees in the south of Tehran.