All the 5 are positioning system used for navigation purpose. The different positioning system is originated from different countries. the positioning system you mentioned belongs to different countries and because of that names are different.
- GPS(GLOBAL POSITIONING SYSTEM) is made by the United States.
- QZSS(QUASI-ZENITH SATELLITE SYSTEM). It is made by Japanese.
- BEIDOU(1 & 2) -it is a satellite navigation system of China.
- GALILEO– this is a European positioning system which is divided into three parts i.e space, ground, the user.
- GLONASS– it is a Russian version of the positioning system has five versions till now.