https://www.posetteforever.com/viewtopic.php?f=23&t=3273&p=39768#p39768
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Nik
Sunday, 08 June 2008, 12:55 AM

Re: A HUGE, Free, Mostly 3DS Archive...
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The *only* info I could find after exhaustive googling was at...
http://swat3.furrycat.net/gsm/gsm.html

Seems GSM belongs to Gskin mesh format created by Sierrra Games...
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Um, also, several of the models that do not show materials in 3DOC do have them in Poser. I was about to unleash the Grouping tools...