[php]
add_filter( 'gform_submit_button', 'form_submit_button', 10, 5 );
function form_submit_button ( $button, $form ){
    $button = str_replace( &quot;input&quot;, &quot;button&quot;, $button );
    $button = str_replace( &quot;/&quot;, &quot;&quot;, $button );
    $button .= &quot;{$form['button']['text']}&lt;/button&gt;&quot;;
    return $button;
}
[/php]