Born and raised Saint Croix, McGuiness moved with his brothers to West Windsor, New Jersey in 2015Feil, Justin. "Brothers push each other to soccer success for WW-P High School South", Community News, October 17, 2017. Accessed December 12, 2022. "The boys moved to West Windsor to live with their aunt in 2015 and last spring, their dad moved up from St. Croix to join them." and attended West Windsor-Plainsboro High School South, where he played prep soccer.Ramesses Moore-McGuiness, Kean Cougars. Accessed February 23, 2020. "High School: West Windsor-South" He has also reached minor success online on TikTok.
