To maintain current awareness on non-discrimination laws by state, the ACLU Non-Discrimination Laws: State by State Map is a great resource.
Free of cost, the ACLU Map allows you to click on the state you wish to know more about (e.g. California), once you click the state, it provides you with the state's non-discrimination law (e.g. California bars discrimination based on sexual orientation and gender identity in employment, housing, and public accommodations).
This resource is great for researchers who want want a easy, fast way to find a concise statement of the law on sexual orientation employment discrimination.