Gabriel Mikhaylovich Ter-Mikelov (Armenian: Գափրիել Տեր-Միքաելյան; 16 April 1874 in Stavropol, Russia – 14 January 1949 in Tbilisi, USSR) was a prominent architect of Armenian descent.
According to Gabriel Ter-Mikelov's sister Suzanna Zohrabyan, the family's origins trace back to Karabakh and their original last name was Aslanbekyan. The family eventually settled in Tbilisi. During the occupation of Tbilisi by Mohammad Khan Qajar in 1795, the city was reduced to ashes and its Christian population were massacred. Almost all members of the Aslanbekyan family were murdered except for a two-year child who was saved by an Armenian priest Ter Mikayel. This child, who was the grandfather of Gavriil Ter-Mikelov, took up the Ter-Mikayelian last name and was later known as Ter-Mikelov due to Russification policies of Czarist Russia. His parents were both born in Tbilisi. Ter-Mikelov's father worked in many state run institutions and due to his knowledge of many languages, he was often sent on foreign trips. Ter-Mikelov's mother was an educated woman who graduated the Tbilisi High School of Young Ladies with Golden Cross Honors and eventually became a teacher herself. Gavriil Ter-Mikelov was born in Stavropol on 16 April 1874. He studied in the Tbilisi Realschule and went to St. Petersburg where in 1893 he entered the St. Petersburg Institute of Civil Engineering and graduated from it in 1899. He moved to Baku where he lived and worked till 1912. After moving to Tbilisi, he became a lecturer at the Tbilisi Academy of Fine Arts, Honored Artist of the Georgian SSR, and member of the Academy of Architecture of the USSR. Ter-Mikelov died on 14 January 1949 at the age of 74 and was buried in the Armenian Vera Cemetery in Tbilisi. Gavriil Ter-Mikelov's architectural career lasted for over 50 years. Throughout his career, Ter-Mikelov had drafted 70 projects, 37 of which were completed.