Gonzalo treble helps Real Madrid thrash Betis, Atletico hopes dented
Spanish striker Garcia, filling in for the injured Kylian Mbappe, opened the scoring after 20 minutes and then volleyed home a superb second early in the second half to give Madrid a commanding lead.
Raul Asencio further extended Xabi Alonso's side's advantage before Cucho Hernandez pulled one back for Manuel Pellegrini's visitors, sixth.
Madrid youth academy product Garcia completed his hat-trick after 82 minutes with a clever flicked finish to delight fans at the Santiago Bernabeu, with Fran Garcia notching a late fifth.