general headquarters vs command post

general headquarters and command post both are nouns.

Word	Noun	Adjective	Verb	Adverb
general headquarters	Yes	No	No	No
command post	Yes	No	No	No

As nouns, general headquarters and command post are synonyms defined as:

general headquarters and command post: military headquarters from which a military commander controls and organizes the forces

Other synonyms of general headquarters include GHQ.

general headquarters (noun)	command post (noun)
military headquarters from which a military commander controls and organizes the forces	military headquarters from which a military commander controls and organizes the forces