Gary Hirano is the father of Stacy and Ginger and the husband of Dr. Hirano. He has black hair, green shirt with gray coat on it, brown pants and white shoes. He married his wife Dr. Hirano on the wedding day. He has his first appearance in the Phineas and Ferb episode I Was a Middle-Aged Robot. But he has no speaking lines. In Tri-State Treasures: Boot of Secrets, he has his appearance with his speaking lines.
He was voiced by Johnathan Ross.