gistfile1.js

var myIcon = new GIcon();
myIcon.image = 'markers/image.png';
myIcon.printImage = 'markers/printImage.gif';
myIcon.mozPrintImage = 'markers/mozPrintImage.gif';
myIcon.iconSize = new GSize(64,64);
myIcon.shadow = 'markers/shadow.png';
myIcon.transparent = 'markers/transparent.png';
myIcon.shadowSize = new GSize(96,64);
myIcon.printShadow = 'markers/printShadow.gif';
myIcon.iconAnchor = new GPoint(32,64);
myIcon.infoWindowAnchor = new GPoint(32,0);
myIcon.imageMap = [35,5,39,6,42,7,45,8,47,9,49,10,56,11,56,12,56,13,55,14,55,15,55,16,55,17,54,18,54,19,54,20,53,21,60,22,61,23,61,24,61,25,54,26,54,27,53,28,60,29,63,30,63,31,62,32,62,33,58,34,59,35,60,36,61,37,61,38,61,39,61,40,60,41,59,42,59,43,58,44,58,45,57,46,52,47,52,48,59,49,60,50,60,51,58,52,52,53,51,54,50,55,49,56,48,57,46,58,45,59,17,59,15,58,13,57,13,56,13,55,14,54,15,53,15,52,16,51,15,50,15,49,14,48,14,47,14,46,14,45,12,44,12,43,13,42,15,41,14,40,14,39,13,38,12,37,12,36,11,35,11,34,10,33,9,32,8,31,8,30,7,29,7,28,6,27,6,26,5,25,5,24,4,23,4,22,3,21,3,20,2,19,2,18,1,17,0,16,0,15,0,14,7,13,9,12,10,11,12,10,14,9,16,8,18,7,22,6,26,5];
Some further reading