When targeting a post through Social, gender and age targets affect only who sees the post in the News Feed. Gender and age targets do not affect visibility on the Facebook page's Timeline. For example, a post targeted to males appears on the Facebook page as public. However, people who liked the page only see the post in their News Feed if they specified they are male on their Facebook user profile.
In contrast, language and geo (location) targets affect the targeting of the post on the Facebook page to make it appear on the page's Timeline as not public. For example, if you target a post to English speakers only, the post is not denoted as public on the page's Timeline. Instead, it appears only on the page's Timeline if viewed by someone with English as a language specified in his or her Facebook user profile.