Gamaliel Díaz Magaña (born 14 February 1981) is a Mexican professional boxer who held the WBC super featherweight title from 2012 to 2013.
In December 2005, Díaz upset the undefeated Mexican American future champion, Robert Guerrero, to win the NABF Featherweight Championship.
He defeated future champion Elio Rojas by split decision, handing the Dominican fighter his first loss, in a WBC Featherweight Title Eliminator.
On October 11, 2008 Gamaliel lost to Interim WBC Super Featherweight Champion, Mexican Humberto Soto.
After scoring 13 consecutive victories, Diaz challenged WBC Super Featherweight champion Takahiro Ao in his hometown of Tokyo, on December 27, 2012.