adrianlittee on "Using jQuery .load() function with wordpress and gravity forms"

I am developing a series of pages which will integrate with Gravity Forms.

I'm using jQuery to send data to a div from a page I have created.

Requesting Page

<a href="#" onclick="showEntry(\''.$url.'\')">View</a>
<div id="viewEntry"></div>

Javascript/jQuery page

function showEntry(url){
    jQuery(document).ready(function($){
        $('#viewEntry').load(url);
    });
}

PHP data page - entry.php

$form_id = $_GET['f'];
$form = GFFormsModel::get_form_meta( $form_id );

var_dump($form);

When ever I click run I get an error in my log file saying: PHP Fatal error: Class 'GFFormsModel' not found in

I want to know how I can get the entry.php file recognizing all the classes in the rest of my Wordpress file system.

Any help would be great!