crm.fsf.org/20131203/files/sites/all/modules-old/civicrm/drupal/modules/civicrm_group_roles/readme.txt

   1 This module provides two-way synchronization between Drupal Roles and CiviCRM based on rules defined by the administrator.
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   3 Note that for now, removing from a Role does NOT remove the user from the CiviCRM group, so be sure to remove them manually from the group if you need to do so.
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   5 Original Author: Matt Chapman - http://drupal.org/user/143172
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   7 For support & feature requests, please visit http://forum.civicrm.org/