Гавриил was born in 1740. Гавриил's father is Алексей Хмелёв and his mother is <Unknown>. His paternal grandfather was Иван Афонасьевич Хмелёв and his paternal grandmother is <Unknown>. He has three brothers and a sister, named Иван, 2ой, Кирило and Марфа. He is the youngest of the five children.