[1] After graduating from Kailua High School, Gaspar spent the next thirty years doing local shows throughout Hawaii with acts such as the Mackey Feary Band, Harmony, Simplisity, and played in Seattle with first billing with the famous blues guitarist Albert Collins.

Pearl Jam frontman Eddie Vedder first met Gaspar while in Hawaii.

He has a songwriting credit for the song "Love Boat Captain" which is on Riot Act.

According to Gaspar, the song initially developed out of a jam session he had with Vedder shortly after the two first met.

"[3] He has become known for his long solos during "Crazy Mary", a song originally written by Victoria Williams, which has become a fan favorite during live Pearl Jam shows.