Field for if the current user is a member of the organic group
There is no field or direct method to show "If the current user is member of the group or not". In your case I have found a solution here:


Create a view - showing list of all groups(you have already created).
Add new Relationship - OG membership: OG membership from Node group
Add new field - (OG membership from node group) OG membership: Group ID (Group ID), you can exclude it from display.
Add new field - Global: PHP (you have to enable Views PHP module for this field) and put below code in this field:

&lt;?php

global $user;
$account = user_load($user-&gt;uid);
$ugrpid = $account-&gt;og_user_node['und'][0]['target_id'];

if($row-&gt;gid == $ugrpid){
  echo "Already Subscribed.";
}else{
  echo "Not member of this Group.";
}

?&gt;



This is how my view look like( Screenshot ).