Activate Gii code generator for frontend in YiiBoilerPlate

1) First check the directory "runtime" exist or not in frontend folder if not then create it.
2) Go to folder frontend/config
3) Open file main.php
4) Add the following line in array()

'modules' => array(
                'gii' => array(
                    'class' => 'system.gii.GiiModule',
                    'password' => '<your_gii_password>',
                    'generatorPaths' => array(
                        'bootstrap.gii'
                    )
                ),
            ),

i.e.

return CMap::mergeArray(
                array(
            // @see http://www.yiiframework.com/doc/api/1.1/CApplication#basePath-detail
            'basePath' => 'frontend',
            // set parameters
            'params' => $params,
            // preload components required before running applications
            // @see http://www.yiiframework.com/doc/api/1.1/CModule#preload-detail
            'preload' => array('log'),
            // @see http://www.yiiframework.com/doc/api/1.1/CApplication#language-detail
            'language' => 'en',
            // uncomment if a theme is used
            /* 'theme' => '', */
            // setup import paths aliases
            // @see http://www.yiiframework.com/doc/api/1.1/YiiBase#import-detail
            'import' => array(
                'common.components.*',
                'common.extensions.*',
                'common.models.*',
                // uncomment if behaviors are required
                // you can also import a specific one
                /* 'common.extensions.behaviors.*', */
                // uncomment if validators on common folder are required
                /* 'common.extensions.validators.*', */
                'application.components.*',
                'application.controllers.*',
                'application.models.*'
            ),
            /* uncomment and set if required */
            // @see http://www.yiiframework.com/doc/api/1.1/CModule#setModules-detail
            /* 'modules' => array(), */
            'components' => array(
                'errorHandler' => array(
                    // @see http://www.yiiframework.com/doc/api/1.1/CErrorHandler#errorAction-detail
                    'errorAction' => 'site/error'
                ),
                'db' => array(
                    'connectionString' => $params['db.connectionString'],
                    'username' => $params['db.username'],
                    'password' => $params['db.password'],
                    'schemaCachingDuration' => YII_DEBUG ? 0 : 86400000, // 1000 days
                    'enableParamLogging' => YII_DEBUG,
                    'charset' => 'utf8'
                ),
                'urlManager' => array(
                    'urlFormat' => 'path',
                    'showScriptName' => false,
                    'urlSuffix' => '/',
                    'rules' => $params['url.rules']
                ),
            /* make sure you have your cache set correctly before uncommenting */
            /* 'cache' => $params['cache.core'], */
            /* 'contentCache' => $params['cache.content'] */
            ),
            /* uncomment and set if required */
// @see http://www.yiiframework.com/doc/api/1.1/CModule#setModules-detail
            'modules' => array(
                => array(
                    'class' => 'system.gii.GiiModule',
                    'password' => 'admin',
                    'generatorPaths' => array(
                        'bootstrap.gii'
                    )
                ),
            ),
                ), CMap::mergeArray($mainEnvConfiguration, $mainLocalConfiguration)
);

5) Check it by accessing http://your_domain/gii

Thanks