This is the 7318th most frequent Russian word.
гсу
The combination "гсу" does not have a standalone meaning in Russian. It may be an abbreviation, a typo, or context-dependent.
ГСУ here refers to an official abbreviation for Главное следственное управление, the Main Investigative Directorate.
ГСУ осуществляет расследование сложных уголовных дел.
The Main Investigative Directorate conducts investigations into complex criminal cases.
ГСУ is again used to refer to the Main Investigative Directorate, indicating the workplace of the speaker.
Я работаю в ГСУ уже десять лет.
I have been working in the Main Investigative Directorate for ten years.
ГСУ denotes the institution responsible for providing professional training for investigators.