Just pulling this out of my ass, but perhaps it's an artifact from handwritten medical charts. GSW is shorter to write.

You can yell GSW across a crowded room and not cause a panic like yelling "GUN SHOT wound" might.

Hospitals and ambulances do a lot of handwritten reports. In a conversation, the nurse/doctor/paramedic will say 'gunshot wound' but write it GSW.

Worked in public health and never heard anyone say 'GSW.'

It's quicker to write/type the abbreviation, so syllables don't matter. Most common example of more syllables in the abbreviation than the words themselves is "WWW" (9 syllables) for "World Wide Web" (3 syllables). Quicker to type but longer to speak.

Wait until you learn about abbreviating the World Wide Web 

Depends on the language you use. In the Netherlands W is pronounced as "wae" instead of "double you".

G S Dub.

It's also shorter to write.

I dont know why GWS is used , but there are a bunch of the medical abbreviations that are not intuitive to me.

• PRN = As Needed
• ASA = aspirin
• BRP = Bathroom Priviledges (this one is intuitive)
• PT = Bloodtest
• bid = Twice a Day
• BS can = Breath Sounds or Bowl Sounds
• C with a “-“ on top of it means “with”
• M = so many things.

Is this a stupid ai question?

How are you pronouncing those words? I get 6 and 3 syllables respectively.