G5also: ジーファイブMeanings1nounGroup of Fivehistorical termHistorical term for the senior financial officials from the US, UK, West Germany, Japan, and France.G5は1980年ねん代だいの国こく際さい金きん融ゆう政せい策さくで重じゅう要ような役やく割わりを果はたした。The G5 played an important role in international financial policy in the 1980s.