An individual’s enduring physical, romantic, and/or emotional attraction to members of the same and/or different gender, including lesbian, gay, bisexual, and heterosexual (straight) orientations.
Gender identity and sexual orientation are not the same. Transgender people may be straight, lesbian, gay, bisexual, or queer. For example, a person who transitions from male to female and is attracted solely to men would typically identify as a straight woman.
Include sexual orientation only when it is pertinent to a story, and avoid references to sexual preference or to a gay or alternative lifestyle.
(Source: GLAAD Media Reference Guide, AP Stylebook)