PAGE 1
000 B000000 10/31/2006
000 C000000 0001285650
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 Calamos Global Total Return Fund
001 B000000 811-21547
001 C000000 6302457200
002 A000000 2020 Calamos Court
002 B000000 Naperville
002 C000000 IL
002 D010000 60563
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
008 A000001 CALAMOS ADVISORS LLC
008 B000001 A
008 C000001 801-29688
008 D010001 NAPERVILLE
008 D020001 IL
008 D030001 60563
010 A000001 STATE STREET CORPORATION
010 B000001 01-07511
010 C010001 BOSTON
010 C020001 MA
010 C030001 02111
012 A000001 BANK OF NEW YORK (COMMON)
012 B000001 85-05006
012 C010001 NEW YORK
012 C020001 NY
012 C030001 10286
013 A000001 DELOITTE & TOUCHE, LLP
013 B010001 CHICAGO
013 B020001 IL
013 B030001 60606
014 A000001 CALAMOS FINANCIAL SERVICES LLC
014 B000001 8-37854
015 A000001 BANK OF NEW YORK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10286
015 E010001 X
PAGE 2
015 A000002 Banca Intesa
015 B000002 S
015 C010002 Milan
015 D010002 Italy
015 E040002 X
015 A000003 BNY LONDON - CREST
015 B000003 S
015 C010003 LONDON
015 D010003 UNITED KINGDOM
015 E040003 X
015 A000004 Credit Suisse Zurich
015 B000004 S
015 C010004 Zurich
015 D010004 Switzerland
015 E040004 X
015 A000005 Euroclear Bank
015 B000005 S
015 C010005 Brussels
015 D010005 Belgium
015 E040005 X
015 A000006 National Australia Bank
015 B000006 S
015 C010006 Melbourne
015 D010006 Australia
015 E040006 X
015 A000007 BNP Paribas Security Services
015 B000007 S
015 C010007 Athens
015 D010007 Greece
015 E040007 X
015 A000008 Royal Bank of Canada
015 B000008 S
015 C010008 Toronto
015 D010008 Canada
015 E040008 X
015 A000009 Standard Bank SA
015 B000009 S
015 C010009 Johannesburg
015 D010009 South Africa
015 E040009 X
015 A000010 Skandinaviska Enskilda Banken
015 B000010 S
015 C010010 Stockholm
015 D010010 Sweden
015 E040010 X
015 A000011 Nordea Bank Finland
015 B000011 S
015 C010011 Helsinki
015 D010011 Finland
015 E040011 X
015 A000012 The Bank of Tokyo-Mitsibushi Limited
PAGE 3
015 B000012 S
015 C010012 Tokyo
015 D010012 Japan
015 E040012 X
015 A000013 Bank Austria AG
015 B000013 S
015 C010013 Vienna
015 D010013 Austria
015 E040013 X
015 A000014 United Overseas Bank Ltd./DBS Bank Ltd.
015 B000014 S
015 C010014 N/A
015 D010014 Singapore
015 E040014 X
015 A000015 Banco Bilbao Vizcaya Argentaria S.A.
015 B000015 S
015 C010015 Madrid
015 D010015 Spain
015 E040015 X
015 A000016 Banamex Mexico
015 B000016 S
015 C010016 Mexico City
015 D010016 Mexico
015 E040016 X
015 A000017 BHF Bank Aktiengesellschaft
015 B000017 S
015 C010017 Frankfurt
015 D010017 Germany
015 E040017 X
015 A000018 DNB Nor BK ASA
015 B000018 S
015 C010018 Oslo
015 D010018 Norway
015 E040018 X
015 A000019 Shanghai Bank
015 B000019 S
015 C010019 Shanghai
015 D010019 China
015 E040019 X
018 000000 Y
019 A000000 Y
019 B000000 15
019 C000000 CALAMOSINV
020 A000001 DEUTSCHE BANK SECURITIES, INC.
020 B000001 13-2730828
020 C000001 75
020 A000002 MORGAN STANLEY
020 B000002 13-2655998
020 C000002 44
020 A000003 BANK OF NEW YORK
020 B000003 13-3894751
PAGE 4
020 C000003 23
020 A000004 MERRILL LYNCH
020 B000004 13-2740599
020 C000004 10
020 A000005 J.P. MORGAN SECURITIES INC.
020 B000005 13-3224016
020 C000005 8
020 A000006 CREDIT SUISSE FIRST BOSTON CORPORATION
020 B000006 13-5659485
020 C000006 8
020 A000007 CREDIT SUISSE FIRST BOSTON
020 B000007 13-2853402
020 C000007 7
020 A000008 NCB Stockbrokers LTD.
020 C000008 6
020 A000009 ITG, INC.
020 B000009 95-4339369
020 C000009 5
020 A000010 Enskilda Securiities
020 B000010 13-3497509
020 C000010 4
021 000000 219
022 A000001 BANK OF NEW YORK
022 B000001 13-3894751
022 C000001 1334695
022 D000001 267
022 A000002 BANK OF AMERICA SECURITIES LLC
022 B000002 56-2058405
022 C000002 15031
022 D000002 911
022 A000003 DEUTSCHE BANK SECURITIES, INC.
022 B000003 13-2730828
022 C000003 13176
022 D000003 1364
022 A000004 UBS Financial
022 B000004 13-2638166
022 C000004 11367
022 D000004 1634
022 A000005 J.P. MORGAN SECURITIES INC.
022 B000005 13-3224016
022 C000005 10373
022 D000005 1518
022 A000006 KBC Financial Group
022 B000006 06-1548680
022 C000006 6334
022 D000006 2653
022 A000007 LEHMAN BROTHERS
022 B000007 13-2518466
022 C000007 8170
022 D000007 0
022 A000008 GOLDMAN, SACHS & CO.
PAGE 5
022 B000008 13-5108880
022 C000008 6281
022 D000008 1633
022 A000009 DAIWA SECURITIES GROUP
022 B000009 13-5680329
022 C000009 7569
022 D000009 0
022 A000010 CITIGROUP GLOBAL MARKETS, INC.
022 B000010 11-2418191
022 C000010 7175
022 D000010 0
023 C000000 1452475
023 D000000 13059
024 000000 Y
025 A000001 DEUTSCHE BANK SECURITIES, INC.
025 B000001 13-2730828
025 C000001 D
025 D000001 1207
025 A000002 LEHMAN BROTHERS
025 B000002 13-2518466
025 C000002 E
025 D000002 2775
025 A000003 MORGAN STANLEY
025 B000003 13-2655998
025 C000003 E
025 D000003 960
025 A000004 J.P. MORGAN SECURITIES INC.
025 B000004 13-3224016
025 C000004 E
025 D000004 1898
025 A000005 DAIWA SECURITIES GROUP
025 B000005 13-5680329
025 C000005 E
025 D000005 2318
025 A000006 GOLDMAN, SACHS & CO.
025 B000006 13-5108880
025 C000006 E
025 D000006 1329
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
PAGE 6
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 1.000
048 A010000 0
PAGE 7
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 N
053 C000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 Y
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
PAGE 8
061 000000 0
062 A000000 N
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 0.0
066 A000000 Y
066 B000000 N
066 C000000 N
066 D000000 N
066 E000000 N
066 F000000 N
066 G000000 Y
067 000000 N
068 A000000 N
068 B000000 Y
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 Y
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 Y
070 I020000 N
070 J010000 Y
PAGE 9
070 J020000 Y
070 K010000 Y
070 K020000 Y
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 Y
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 Y
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000 224535
071 B000000 55827
071 C000000 172064
071 D000000 32
072 A000000 12
072 B000000 5425
072 C000000 3515
072 D000000 0
072 E000000 34
072 F000000 1715
072 G000000 0
072 H000000 0
072 I000000 176
072 J000000 54
072 K000000 0
072 L000000 41
072 M000000 17
072 N000000 23
072 O000000 0
072 P000000 0
072 Q000000 34
072 R000000 22
072 S000000 7
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 11
072 X000000 2100
072 Y000000 4
072 Z000000 6878
072AA000000 4853
072BB000000 2283
072CC010000 16585
072CC020000 0
PAGE 10
072DD010000 5173
072DD020000 0
072EE000000 1532
073 A010000 0.6500
073 A020000 0.0000
073 B000000 0.1900
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 361
074 D000000 69592
074 E000000 17575
074 F000000 103761
074 G000000 59
074 H000000 0
074 I000000 11148
074 J000000 0
074 K000000 0
074 L000000 1817
074 M000000 22
074 N000000 204335
074 O000000 0
074 P000000 171
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 3243
074 R040000 11277
074 S000000 59056
074 T000000 130588
074 U010000 8007
074 U020000 0
074 V010000 16.31
074 V020000 0.00
074 W000000 0.0000
074 X000000 6
074 Y000000 0
075 A000000 0
075 B000000 123796
076 000000 16.76
077 A000000 Y
077 B000000 Y
078 000000 N
080 A000000 ICI Mutual Insurance Co.
080 B000000 N/A
080 C000000 8575
081 A000000 Y
081 B000000 20
082 A000000 Y
082 B000000 100
083 A000000 N
PAGE 11
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 2
086 C020000 59000
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 Common Stock
087 A020000 128118106
087 A030000 CGO
087 B010000 Preferred Stock
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE NIMISH BHATT
TITLE TREASURER