Gianmarco is a distinctive boys' name in United States, ranking #5131 in 2000 with 14 recorded births. The name reached its all-time peak in 2005 with 48 births ranking #2408. Since 1996, the popularity has increased by 55.6%. In 2000, approximately 1 in every 140,281 boys born was named Gianmarco. STABLE Recent data shows the name is currently stable.