Ready Class not working

Is there any reason why you aren't using the shortcode rather than using the function call?

The ready classes aren't working because while the shortcode can automatically enqueue the necessary scripts and CSS a form needs to function, the function call cannot do this automatically because of how WordPress executes.

So this means you have to use another function call placed in your themes functions.php file to enqueue the necessary scripts and CSS for a specific form. Documentation for this enqueue function call can be found here:

http://www.gravityhelp.com/documentation/page/Gravity_form_enqueue_scripts

It's also discussed on the documentation page that talks about how to display a form via the function call at the bottom of this page:

http://www.gravityhelp.com/documentation/page/Embedding_A_Form

The function call is more advanced and has to be implemented correctly because of how enqueue in WordPress works. Shortcodes are able to enqueue from the WordPress loop because of how WordPress executes code. Function calls, however, can't do this automatically because they may not be executing somewhere in the code execution life cycle that allows them to do so.