Dennis was born in Webster, Massachusetts to Louis A. Gardner and Blanche M Davis. He graduated from Agawam High School, Agawam, Massachusetts in 1963. He retired from Papy Brothers Construction in Ocala, Florida.
He is survived by his wife of 52 years, Trudy Gardner; son, Louis A Gardner, Jacksonville FL; daughters, Denise woods, Ocala, FL and Kimberly Gardner, Belleview, FL; four grandchildren and 3 great-grandchildren; brother, Ronald L Gardner, Sr., Georgia and his fur babies, Buster and Bella.