Golgo Matsumoto is his pen name and his legal name is Masahiko Matsumoto (松本政彦). He was born on April 17th, 1967. His blood type is A and he is 167cm's in height.
Golgo is a member of the TIM Japanese comedy group. TIM was formed by Golgo and Red in 1994 as an acronym for Time Is Money after close apartments in Tokyo brought the two together.
Chief Golgo (ゴルゴ所長) is his official Pokémon Sunday title.