George O'Malley

During a camping trip, O'Malley learns that Torres has slept with chief of plastic surgery Mark Sloan (Eric Dane), and also discovers that Burke is experiencing tremors in his hand. When O'Malley's father is diagnosed with esophageal cancer and a leaking aortic valve, he refuses to allow Burke to operate on him, instead contacting Erica Hahn (Brooke Smith), Burke's medical school rival. His relationship with Torres is strained when he confronts her about sleeping with Sloan, but he allows her to support him through his father's deteriorating health. Complications from his father's surgery leave him in multi-system organ failure, and his life support is turned off. In an attempt to overcome his grief, O'Malley elopes with Callie to Las Vegas. He later begins to feel that he was mistaken to marry her, and sleeps with Stevens while intoxicated. Stevens confesses that she is in love with him, so O'Malley considers transferring to a different hospital so he can be faithful to his wife. However, he is ineligible to transfer after failing the intern exams. O'Malley decides to repeat his intern year, and confesses to Torres that he slept with Stevens, leading the two to separate. O'Malley and Stevens embark on a short-lived relationship, only to discover there is no real chemistry between them.

Question: does george's father die in grey's anatomy
Answer: yes