1 ranking in the country according to the competition Jurij Vega, and martial arts, winning a title of world champion at the age of 11 according to the Japan Karate Association international regulations.

[5] In 2023, Grgić joined the School of Music faculty at the University of South Carolina, becoming the Assistant Professor of Guitar.

[1][6] Grgić has performed at Hotel des Invalides, Paris, France; Teatro alla Scala, Milan, Italy; Koncerthuset, Stockholm, Sweden; Musikverein, Vienna, Austria; Walt Disney Concert Hall, Los Angeles, US; Strathmore Mansion, North Bethesda, Maryland, US; National Gallery of Art, Washington D.C., US; Beloselsky-Belozersky Palace, St. Petersburg, Russia; Accademia Philharmonicorum, Ljubljana, Slovenia among others.

[12] In 2020, Grgić began his ongoing collaboration with Billboard Charts-topping pianist Paul Cardall, exploring the meditative and mindful aspects of musical composition.

Grgić also served as a mentor for the Bosana Foundation in Los Angeles and has raised funds for a local orphanage in Zenica, Bosnia and Herzegovina, with which he has personal ties.

[16] Grgić believes in an eclectic approach to classical guitar in order to draw in wider audiences for the instrument.