Installation
Installation it's pretty straight forward, you must download the code via SVN for now, and place it in a path that it's in your include path, my recommendation is put it in a /library folder with Zend, then use set_include_path() to the path of the library and then call Zend_Loader::registerAutoload(); that will take care of class finding.
Then you must edit Gecko/Router.php and change the paths in the two constant files, one path is the physical path to the library, and the other is the path to the Assets file, the Assets folder is special and MUST be web readable because it contains JS files and sample images.