    <SEC-DOCUMENT>0001387131-23-008014-index.html : 20230628
    <SEC-HEADER>0001387131-23-008014.hdr.sgml : 20230628
    <ACCEPTANCE-DATETIME>20230628154403
    ACCESSION NUMBER:		0001387131-23-008014
    CONFORMED SUBMISSION TYPE:	N-CSRS
    PUBLIC DOCUMENT COUNT:		25
    CONFORMED PERIOD OF REPORT:	20230430
    FILED AS OF DATE:		20230628
    DATE AS OF CHANGE:		20230628
    EFFECTIVENESS DATE:		20230628

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CALAMOS GLOBAL TOTAL RETURN FUND
    		CENTRAL INDEX KEY:			0001285650
    		IRS NUMBER:				203377281
    		FISCAL YEAR END:			1031

    	FILING VALUES:
    		FORM TYPE:		N-CSRS
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-21547
    		FILM NUMBER:		231051923

    	BUSINESS ADDRESS:
    		STREET 1:		2020 CALAMOS COURT
    		STREET 2:		C/O CALAMOS ADVISORS LLC
    		CITY:			NAPERVILLE
    		STATE:			IL
    		ZIP:			60563
    		BUSINESS PHONE:		6302451046

    	MAIL ADDRESS:
    		STREET 1:		2020 CALAMOS COURT
    		STREET 2:		C/O CALAMOS ADVISORS LLC
    		CITY:			NAPERVILLE
    		STATE:			IL
    		ZIP:			60563
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>N-CSRS
    <SEQUENCE>1
    <FILENAME>cgo-ncsrs_043023.htm
    <DESCRIPTION>CERTIFIED SEMI-ANNUAL SHAREHOLDER REPORT
    <TEXT>
    Document 1 - file: cgo-ncsrs_043023.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>2
    <FILENAME>ex99cert.htm
    <DESCRIPTION>CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER
    <TEXT>
    Document 2 - file: ex99cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.906 CERT
    <SEQUENCE>3
    <FILENAME>ex99-906cert.htm
    <DESCRIPTION>SECTION 906 CERTIFICATIONS
    <TEXT>
    Document 3 - file: ex99-906cert.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>cgo-20230430.xsd
    <DESCRIPTION>XBRL SCHEMA FILE
    <TEXT>
    Document 4 - file: cgo-20230430.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>5
    <FILENAME>cgo-20230430_def.xml
    <DESCRIPTION>XBRL DEFINITION FILE
    <TEXT>
    Document 5 - file: cgo-20230430_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>cgo-20230430_lab.xml
    <DESCRIPTION>XBRL LABEL FILE
    <TEXT>
    Document 6 - file: cgo-20230430_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>cgo-20230430_pre.xml
    <DESCRIPTION>XBRL PRESENTATION FILE
    <TEXT>
    Document 7 - file: cgo-20230430_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>cgo-ncsrs_043023img001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: cgo-ncsrs_043023img001.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>cgo-ncsrs_043023img002.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: cgo-ncsrs_043023img002.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>cgo-ncsrs_043023img003.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: cgo-ncsrs_043023img003.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>cgo-ncsrs_043023img004.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: cgo-ncsrs_043023img004.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>cgo-ncsrs_043023img005.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: cgo-ncsrs_043023img005.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>cgo-ncsrs_043023img006.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: cgo-ncsrs_043023img006.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>cgo-ncsrs_043023img007.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: cgo-ncsrs_043023img007.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>cgo-ncsrs_043023img008.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: cgo-ncsrs_043023img008.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>cgo-ncsrs_043023img009.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: cgo-ncsrs_043023img009.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>cgo-ncsrs_043023img010.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: cgo-ncsrs_043023img010.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>18
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 18 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>19
    <FILENAME>cgo-ncsrs_043023_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 19 - file: cgo-ncsrs_043023_htm.html

    Document 19 - RAW XML: cgo-ncsrs_043023_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>20
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>22
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 22 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>23
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: FilingSummary.html

    Document 23 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>26
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>27
    <FILENAME>0001387131-23-008014-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: 0001387131-23-008014-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>