[GameWizard]

You should have a profile field that has Male and Female and you can place this where your avatar/profile picture code should appear:

<if condition="$userinfo[field12]==Male">
Male Picture
<else />
Female Picture
</if>

This assumes that everyone has selected either one or the other. If some members have no selected either field, you should use the the code below, otherwise you may have males that haven't selected a gender show up as a female:

<if condition="$userinfo[field12]==Male">
Male Picture
</if>
<if condition="$userinfo[field12]==Female">
 Female Picture
 </if>