From Wikipedia:

"The story follows Walt Kowalski, a recently widowed Korean War veteran alienated from his family and angry at the world. Walt's young neighbor, Thao Vang Lor, is pressured by his cousin into stealing Walt's prized 1972 Ford Torino for his initiation into a gang. Walt thwarts the theft and subsequently develops a relationship with the boy and his family.

Gran Torino was a critical and commercial success, grossing nearly $270 million worldwide (making it Eastwood's most successful film to date). Within the Hmong community in the United States, the film received both praise and criticism."

The script is on the Internet here, not a great copy. Here's part of the final scene of GRAN TORINO;
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EXT. SMOKIE'S DUPLEX - SAME TIME

WALT AND COMPANY...

          WALT
          Anybody got a light? No? I got
          one.

Walt's slight grin fades. He mutters to himself...

          WALT
          Hail Mary, full of grace.

Walt reaches into his coat pocket. Six Hmong gangbangers simultaneously level their PISTOLS and FIRE. BULLETS FLY. Walt is struck down. People scream. Walt falls dead. A ZIPPO lighter clutched in his hand.

Walt never intended to kill anyone. Self-sacrifice.

Here's the last scene in video: