I don't know how you can not know how to find GUEdit A few days ago I spent like 15 minutes looking for it and this is what i found.
http://goldenurg.tripod.com/files.html Official site (GolenUrg)
http://www.scindex.com/downloads/?fileid=68 Some site that I found on google
http://broodwar.ingame.de/map/guedit.php Some French Site
http://www.geocities.com/ubolt_head/ Clan (U)’s Old Site
http://www.shadowfortress.net/~unknown Clan (U)’s Current site
http://www.trickznstuff.net/index2.php KckKryptonites site
http://kirbycraft.cjb.net/ KirbyAU’s Site
http://straybullet.cjb.net/ old SC Map making clan
http://www.icefusion.cjb.net/ another old SC Map making clan
http://www.geocities.com/extrememaps/Home0.html yet another old SC Map making clan
http://sap.spyw.com/ There are a lot of Mapmaking clans don’t know of this one is still alive or not
http://www.supremestarcraft.com/do/downloads.php Pretty neat site
http://www.custommaps.org/files/paf...n=category&id=6 CustomMaps
So there now you have 14 differant places to find GUedit