wp_update_post making my post sticky

I need to add: post_date_gmt

$post_information = array(
    'ID' => $_REQUEST['ID'],
    'post_content' =>  $_REQUEST['content'],
    'post_status'  =>  'publish',
    'post_date_gmt' => $post->post_date_gmt
);
wp_update_post($post_information); 

tech