functions.php

// Populate Form Fields
// ID
add_filter( 'gform_field_value_ID', 'populate_ID' );
function populate_ID( $value ) {
    $id = get_the_ID();
    return $id;
}
// Job Title
add_filter( 'gform_field_value_jobTitle', 'populate_jobTitle' );
function populate_jobTitle( $value ) {
    $job_title = get_the_title(get_the_ID());
    return $job_title;
}
// Owner
add_filter( 'gform_field_value_owner', 'populate_owner' );
function populate_owner( $value ) {
    $owner = get_field('owner_email', get_the_ID());
    return $owner;
}
// City
add_filter( 'gform_field_value_jobCity', 'populate_city' );
function populate_city( $value ) {
    $city = get_field('job_city', get_the_ID());
    return $city;
}