What does Guangzhou News G4 mean?

G4, whose full name is "protection of dignitaries group", is an action support group under the political department, while MI5 in Britain is the commander-in-chief behind the scenes. According to this, G4 may be the acronym of the appropriate combination of words such as Guard Governmental Giant Group or Garrison Governmental Giant Gang, or it may be the appropriate combination of Guard or Garrison for (English pronunciation is the same as the number 4).

Guangzhou TV Station uses G4, which I personally think should be the abbreviation of GO FOR.