$id = get_main_site_id();
switch_to_blog( $id );

$global_media_network = rwmb_meta( 'global_media_network', ['object_type' => 'network_setting'], 'map');

$global_media_network_group_images = $global_media_network['global_media_network_images_group']['global_media_network_group_images'];
foreach ( $global_media_network_group_images as $image_id ) {
    $image = get_post( $image_id );
    echo '<img src="' . $image->guid . '">';
}

// Display wording
$global_media_network_cta_wording = $global_media_network['global_media_network_cta']['global_media_network_cta_wording'];
echo $global_media_network_cta_wording;

restore_current_blog();