Kammala wannan jumla: An haife shi a Newark, New Jersey, Gibbons ya girma a Belleville, New Jersey. Ya kammala karatunsa daga Makarantar Saint Benedict a shekarar 1942. Ya yi aiki a cikin Rundunar Sojan Ruwa ta Amurka daga 1943 zuwa 1946. Gibbons ya sauke karatu daga Kwalejin Holy Cross a 1947 tare da digiri na digiri na digiri na digiri da kuma daga Harvard Law School a 1950 tare da digiri na digiri. Bayan kammala karatunsa, Gibbons ya shiga kamfanin Crummy & Consodine. Bayan shekaru da yawa tare da kamfanin, an kira shi abokin tarayya kuma sunan kamfanin ya canza zuwa Crummy, Consodine & Gibbons. A shekara ta 1967, Gibbons ya zama shugaban kungiyar lauyoyi na jihar New Jersey, kuma memba ne na Hukumar Gwamna kan Rikice-rikicen Jama'a. Wannan shi ne a lokacin da
Rikicin Newark wanda ya yi sanadiyar mutuwar mutane 23 da kuma kama mutane fiye da 1,500. Kamfanin ya amsa ta hanyar aika motoci cike da lauyoyi zuwa kotunan don hanzarta aiwatar da aikace-aikacen beli da rage yawan kurkuku. Kamfanin ya wakilci da yawa daga cikin wadanda ake tuhuma a kan wani pro bono tushe.