Galician: GH digraph

[Cenzontle]

Wikipedia's article "Romance languages" says of the digraph <GH> that it is used "in Galician for the voiceless pharyngeal fricative /ħ/ (not standard sound)".
I would take this to be the sound linked to Arabic ح , usually transliterated simply as <h> in, for example, the name "Muhammad".
This is a surprising statement to me. Can anyone shed light on it, with example words, etc.?

 

[Dymn]

The famous Gheada. <Gh> isn't part of the spelling conventions, it's just the informal phonetic transcription if you want to emphasize the pronunciation for whatever purpose.

 

[Cenzontle]

Thank you, Dymn. I was going to ask " '[T]o emphasize the pronunciation' of what?", but your link to Gheada answered my questions.