Gianmarco is a distinctive boys' name in United States, ranking #2408 in 2005 with 48 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 433.3%. In 2005, approximately 1 in every 41,607 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.