Gravity Forms Social Addon

add_filter( 'janrain_gforms_profile_data', 'add_birthday_field' );

function add_birthday_field( $fields ) {
    $fields['birthday'] = array(
        'name' => 'Birthday',
        'function' => 'birthday_field'
    );
    return $fields;
}


function birthday_field( $profile ) {
    return $profile->merged_poco->gender;
}

add_filter( 'janrain_gforms_profile_data', 'add_gender_field' );

function add_gender_field( $fields ) {
    $fields['birthday'] = array(
        'name' => 'Gender',
        'function' => 'gender_field'
    );
    return $fields;
}

function gender_field( $profile ) {
    return $profile->merged_poco->gender;
}