I found a few maps, ive not tested any yet and they would be no good for roleplay (Too small, css stuff) and some are really ugly.
Cordon:
http://cs-mapping.com.ua/forum/showthread.php?t=18712 (http://cs-mapping.com.ua/forum/showthread.php?t=18712)
Pripyat like map:
http://cs-mapping.com.ua/forum/showthread.php?t=22407 (http://cs-mapping.com.ua/forum/showthread.php?t=22407)
Pripyat like map:
http://cs-mapping.com.ua/forum/showthread.php?t=23115 (http://cs-mapping.com.ua/forum/showthread.php?t=23115)
Agroprom:
http://cs-mapping.com.ua/forum/showthread.php?t=25486 (http://cs-mapping.com.ua/forum/showthread.php?t=25486)
Agropromish map:
http://cs-mapping.com.ua/forum/showthread.php?t=22154 (http://cs-mapping.com.ua/forum/showthread.php?t=22154)
Pool map (Kinda dumb)
http://cs-mapping.com.ua/forum/showthread.php?t=22611 (http://cs-mapping.com.ua/forum/showthread.php?t=22611)
Random stalker map
http://cs-mapping.com.ua/forum/showthread.php?t=22150 (http://cs-mapping.com.ua/forum/showthread.php?t=22150)
Decompile them, then import it to gmod. :D
I like the Cordon map.
Maybe we could edit them a bit and put them together.
A lot of these are very good, if we could put them together that'd be great but, it'd also be considered (by me) stealing.
What makes them so good is that the textures relate to stalker, and the forest/atmosphere does as well.