You can show this information by adding lava to the Group Detail style sheet that the group list blocks references. Add something like this: (lava provided by Brandon Meeks)
<div class="col-sm-12 group-member-badges">
<div class="rockbadge rockbadge-label">
<span class="label label-info"><i class="fa fa-birthday-cake"></i> {{ member.Person.BirthMonth }}/{{ member.Person.BirthDay }}</span>
</div>
{% assign baptismDate = member.Person | Attribute:'BaptismDate' %}
{% if baptismDate != '' -%}
<div class="rockbadge rockbadge-icon rockbadge-icon-nobg" style="color: #23a5c5; font-size: 24px;" data-toggle="tooltip" data-original-title="{{ Person.NickName }} was baptized on {{ baptismDate }}.">
<i class="badge-icon fa fa-tint"></i>
</div>
{% else -%}
<div class="rockbadge rockbadge-icon rockbadge-icon-nobg rockbadge-disabled" style="color: #23a5c5e; font-size: 24px;" data-toggle="tooltip" data-original-title="No baptism date entered for {{ Person.NickName }}.">
<i class="badge-icon fa fa-tint"></i>
</div>
{% endif -%}
</div>
For results like this:
