Notable for his roles in such Filipino and Malaysian films as Miss You Like Crazy (2010) and Tipu Kanan Tipu Kiri (2008), Isaac is also known for writing, directing, and starring in a 2008 comedy movie titled Cuci.
Before beginning his acting career, he played on the soccer team at St. John's Institution in Kuala Lumpur, Malaysia.
Apart from his acting and directing careers, he worked as a model.
Born Gerald Hans Isaac, he grew up in a family of Spanish, Filipino, and Indian heritage.
He and Bea Alonzo were both cast in major roles in Miss You Like Crazy.