For birthdate, if you have the field type set to "Date" that should allow you to select it in the import area. That functionality has been tested extensively and you shouldn't have issues there.
For the gender field, it's a little more difficult as Facebook only returns "male" or "female" If you're using those exact options in your drop-down, then we can easily help you add those as options to map to. If you're using something else, then it's much more difficult as the string imported will still be "male" or "female" which won't align with any available options from your drop-down. To allow mappings into "select" type fields, you'll need to make a minor modification to the JomSocial Profile Plugin. In the /plugins/jfbcprofiles/jomsocial.php file, you'll need to update line 429 from:
$query = 'SELECT * FROM #__community_fields WHERE type="text" OR type="textarea" OR type="date" ORDER BY ordering';
to (adding the OR type="select")
$query = 'SELECT * FROM #__community_fields WHERE type="text" OR type="textarea" OR type="date" OR type="select" ORDER BY ordering';
For the 4.2 release, we're planning to have a revamped Profile system which should make customized mappings easier into special fields, like gender. Until then, hope the above helps.
Thanks,
Alex
Profile Mapping does not work with drop-down fields
