def grid_case_group(self, group_id):
    """Get a particular grid case group belonging to a project

    Arguments:
        groupId(int): group id

    Returns:
        :class:`rips.generated.generated_classes.GridCaseGroup`
    """
    case_groups = self.grid_case_groups()
    for case_group in case_groups:
        if case_group.group_id == group_id:
            return case_group
    return None