As a head coach at the professional club level, García Reneses won the FIBA European Super Cup championship in 1986.

[1] During his club head coaching career, García Reneses trained and developed several young players that would eventually go on to play in the NBA, such as: Pau Gasol, Juan Carlos Navarro, Rudy Fernández, Ricky Rubio, and Kristaps Porziņģis.

García Reneses also coached two basketball teams from Badalona, Cataluña, Spain: Círcol Catòlic (also called "Cotonificio" or "Coto"), and Joventut, where he worked from 1983–1985 and also from 2003–2008.

As FC Barcelona's head coach, García Reneses won nine Spanish national domestic Liga ACB championships.

Under García Reneses, several talented Alba youth players, such as Tim Schneider and Bennet Hundt, made the leap up from the German junior ranks, to the senior men's Bundesliga team.

García Reneses won the bronze medal with the Spanish Under-16 junior national team, at the 1979 FIBA Europe Under-16 Championship.

In June 2008, García Reneses became the head coach of the senior men's Spanish national team, after he replaced Pepu Hernández in the role.