[6] In 2007, Gabrielino earned the Silver Medal status from the U.S. News & World Report based on standardized test performance in Math and English and AP courses taken and passed with a "3" or better.

[8] In response, the Alhambra School District (ASD) filed a lawsuit alleging that the California Board of Education had improperly excluded Alhambra voters and because ASD stood to lose as much as US$1.8 million in state funding, since the planned high school would siphon away 1,400 students.

In June 1994, the Los Angeles Superior Court ruled in favor of Alhambra, declaring that the 1992 election was unconstitutional because all the stakeholders had not been allowed to vote in the measure.

[13] On March 20, 1999, an arsonist set a US$2 million fire that destroyed 2 offices and 10 classrooms, effectively displacing 400 of the 1,400 students on campus.

The current campus, built in 2002, is 197,974 square feet (18,392.4 m2) and consists of administration offices, classroom buildings, a media center and library, a gymnasium, and a theatre.

Gabrielino defeated James Monroe High School to win the 2008 Los Angeles County championship.

[22] In March 2011, 16-year-old Kevin Chiao, a 110-meter hurdler, ranked among the top 50 in the state of California, making him the first Gabrielino student to do so.

[24] In 2008, Cynthia Talavera became the Choral Director and led the Advanced Show Choir to its first Gold Win in 8 years at the Forum Music Festival at Fullerton College.