The California Assembly on Tuesday approved a bill that seeks to include the historical contributions of gay, lesbian, bisexual and transgender Americans in the state's textbooks, the Los Angeles Times reported.

The Democrat-controlled Assembly voted 49 to 25 in favor of Senator Mark Leno's FAIR Education Act. The Senate approved the measure in April. It now goes to Governor Jerry Brown for his signature.

Assemblyman Tim Donnelly of San Bernardino, a Republican, argued against the bill on the Assembly floor. He said the measure would promote “a homosexual agenda.”

“As a Christian, I am deeply offended,” he said.

Leno, an openly gay Democrat from San Francisco, told Senate colleagues that his legislation would help curb the bullying of gay teens.

“We are second-class citizens and children are listening,” he said. “When they see their teachers don't step up to the plate when their classmate is being harassed literally to death, they are listening and they get the message that there is something wrong with those people.”

“The struggle of the multicultural and multiethnic LGBT community in California is one of the greatest stories yet to be told,” said Equality California Executive Director Roland Palencia. “The FAIR Education Act will ensure that public schools acknowledge the heroism of individuals and communities who in spite of countless barriers continuously overcome adversity.”

Opponents of the legislation include, the socially conservative group headed by Randy Thomasson, which called the bill the state's “most in-your-face sexual indoctrination yet,” and called on Brown to veto the measure.

“This sexual brainwashing bill would mandate that children as young as 6 years old be told falsehoods – that homosexuality is biological, when it isn't, or healthy, when it's not.,” Thomasson said.

“Parents don't send their sons and daughters to school to learn to admire homosexuality, bisexuality, cross-dressing, 'sex-change' operations, homosexual 'marriage,' or to support legal persecution of people who disagree,” he added. “We urge Governor Brown to respect parents, remember basic academics, and basic family values, and veto this bad bill when it reaches his desk.”