Career
Born in Domokos, Gravanis began playing football with local side Achilles Domokos. Gravanis joined Panionios in July 1977, and played eleven seasons for the club in the Alpha Ethniki, appearing in 269 league matches. Gravanis made three appearances for the Greece national football team during 1982.
Gravanis died in a Patras hospital at age 54.