How to find duplicate records merge in MS.SQL

Hi Friends, 

Please ref my script, based on the GroupID, find the duplicate rows then merge, when VillageID Null/Zero the record can be removed.

SQL Table Script:

Create Table #T_Location(BranchID Int, ClusterID INT, ClusterName Varchar(100),VillageID INT, VillageName Varchar(100) ,GroupID INT,GroupName Varchar(100))

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		501,		'Neeradi Nagar', 3001,		'Defense Rx',	12,			'PPC 1991 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		501,		'Neeradi Nagar', '',			'',			12,		'PPC 1991 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		503,		'PTS Ave',		'',			'',				15,		'IAF 1991 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		503,		'PTS Ave',		3006,		'X Crook',		16,			'BSF 1994 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		503,		'PTS Ave',		'',			'',				16,			'BSF 1994 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		507,		'OMR YX Block', '',			'',				20119,		'YX V 1981 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		507,		'OMR YX Block', 3008,		'Zinc Force',	20120,		'YX V 1982 Batch')

INSERT INTO #T_Location(BranchID,	ClusterID,	ClusterName,	VillageID,	VillageName,	GroupID,	GroupName)
Values				   (100,		507,		'OMR YX Block', '',			'',				20120,		'YX V 1982 Batch')

Select * from #T_Location

Expected Result:

Thanks in advance.