Wiki list of ALCU positions
Religious liberty: Defends the individual right of Americans of all religions to practice and/or display affirmations of their faith in public, but not on public property with government sponsorship or endorsement.
The decriminalization of drugs such as heroin, cocaine and marijuana.
Separation of church and state; under this mandate, the ACLU:
* Opposes the government-sponsored display of religious symbols on public property.
* Opposes official prayers, religious ceremonies, and some kinds of "moments of silence" in public schools or schools funded with public money.
Full freedom of speech and of the press, including school newspapers.
Abolition of capital punishment.
Reproductive rights, including the right to use contraception and to have an abortion.
Full civil rights for lesbian, gay, bisexual and transgender people, including government benefits for same-sex couples equal to those provided for heterosexual ones.
Affirmative action as a means of redressing past discrimination and achieving a racially diverse student body.
The rights of defendants and suspects against unconstitutional police practices.
Privacy as it "works to preserve the American tradition that the government not track individuals or violate privacy unless it has evidence of wrongdoing."
Immigrants' rights by "challenging unconstitutional laws and practices, countering the myths upon which many of these laws are based."
Concerning the Second Amendment, specifically gun control, the ACLU embraces the States' Right Model interpretation of the Second Amendment, which only recognizes a state's right to possess firearms, the organization officially declares itself "neutral" on the issue of gun control, pointing to previous Supreme Court decisions such as United States v. Miller to argue that the Second Amendment applies to the preservation or efficiency of a well-regulated militia, and that "except for lawful police and military purposes, the possession of firearms by individuals is not constitutionally protected."
It's a mixed bag for me, I support some of their positions, others are shades of gray but there's a few I absolutely disagree:
Decriminalization of drugs
Abolition of capitol punishment
Right to abortion
Affirmative Action