In our previews post we have explained how to add customer gender to your timeline profile about section and now you need to concern about the privacy of custom gender. Privacy is very important before adding any personal information on Facebook. If you are adding any custom gender and will like to show only to your self's or even your self or just custom friends you selected.
how set privacy for custom genders on Facebook Timeline
Step 1: From your Timeline profile select the About tab.
Step 2: On your About section on Timeline click Edit of Basic information fields and select Custom on Gender select.
Step 4: Than click on the Save button to save your settings.