Gabelli Global Growth Fund (GGGAX) N-CSR Certified annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORMN-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT

INVESTMENT COMPANIES

Investment Company Act file number            811-07896                    

GAMCO Global Series Funds, Inc.

(Exact name of registrant as specified in charter)

One Corporate Center

Rye, New York 10580-1422

(Address of principal executive offices) (Zip code)

Bruce N. Alpert

Gabelli Funds, LLC

One Corporate Center

Rye, New York 10580-1422

(Name and address of agent for service)

Registrant’s telephone number, including area code: 1-800-422-3554

Date of fiscal year end:  December 31

Date of reporting period:  December 31, 2019

FormN-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule30e-1 under the Investment Company Act of 1940 (17 CFR270.30e-1). The Commission may use the information provided on FormN-CSR in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by FormN-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in FormN-CSR unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Reports to Stockholders.

The Report to Shareholders is attached herewith.

The Gabelli Global Content & Connectivity Fund

Annual Report — December 31, 2019

(Y)our Portfolio Management Team

Mario J. Gabelli, CFA Chief Investment Officer	Evan D. Miller, CFA Portfolio Manager BA, Northwestern UniversityMBA, Booth School of Business,University of Chicago	Sergey Dluzhevskiy, CFA, CPA Portfolio Manager BS, Case Western Reserve University MBA, The Wharton School, University of Pennsylvania	Brett Harriss Portfolio Manager BA, Columbia University MBA, Columbia BusinessSchool, ColumbiaUniversity

To Our Shareholders,

For the year ended December 31, 2019, the net asset value (NAV) per Class AAA Share of The Gabelli Global Content & Connectivity Fund increased 15.6% compared with an increase of 25.1% for the Morgan Stanley Capital International (MSCI) All Country (AC) World Communication Services Index. Other classes of shares are available. See page 3 for performance information for all classes.

Enclosed are the financial statements, including the schedule of investments, as of December 31, 2019.

Performance Discussion (Unaudited)

The Fund’s objective is to provide investors with appreciation of capital. Current income is a secondary objective of the Fund.

The Fund’s investment strategy is to invest its net assets in common stocks of companies in the telecommunications, media, and information technology industries which Gabelli Funds, LLC, the Adviser believes are likely to have rapid growth in revenues and earnings and potential for above average capital appreciation or are undervalued. In accordance with its concentration policy, the Fund will invest at least 25% of the value of its total assets in the telecommunications related industry, and not invest more than 25% of the value of its total assets in any other particular industry.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (www.gabelli.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. To elect to receive all future reports on paper free of charge, please contact your financial intermediary, or, if you invest directly with the Fund, you may call800-422-3554 or send an email request to info@gabelli.com.

Global equities rebounded from a challenging fourth quarter, with the MSCI AC World Index up 12.3% in the first quarter of 2019. The stock market rally was largely driven by indications from central banks in the U.S. and Europe that monetary tightening was unlikely in the near-term as well as signs of progress in the U.S. - China trade negotiations. Information Technology was the best performing sector, up 18.9%, followed by real estate (+16.2%), helped by expectations that interest rates may remain at levels lower than previously anticipated, and energy (+14.3%), driven by higher oil prices. The communications sector (up 11.2% in the quarter) held its own, with North America (+13.9%) leading all geographic regions.

Global equities rose in the second quarter, with MSCI AC World Index up 3.8%, on continued dovishness from major central banks as well as renewed hopes for the U.S. – China trade deal after Presidents Donald Trump and Xi Jinping agreed to restart negotiations (with no near-term escalation in tariffs) at the G20 meeting in Osaka. Financials (led by JP Morgan Chase and Citigroup) was the best performing sector in the quarter, up 6.1%, followed by Information Technology (+5.3%), and Consumer Discretionary (+4.6%). Communication Services sector was in the “middle of the pack,” up 3.4% in the second quarter.

MSCI AC World Index was essentially flat for the third quarter, reflecting a mixed quarter for global equities (with developed markets registering modest gains and emerging markets declining), amidst continued concerns over the U.S. - China trade dispute and global growth, while central banks in the U.S. and Europe remained largely accommodative. Utilities was the best performing sector in the quarter, up 5.6%, followed by Consumer Staples (+3.7%), Real Estate (+3.0%), and Information Technology (+2.7%). Communication Services sector was in the “middle of the pack,” up 0.4% in the third quarter.

MSCI AC World Index recorded a robust fourth quarter, with strong gains across all major geographies. Although much of the focus has been on the U.S. market reaching record highs, the 9.0% gain in the MSCI AC World Index was achieved with reasonably consistent contributions from North America (+8.9%), Europe (+8.9%), Latin America (+10.5%), Japan (+7.5%), and Asia,ex-Japan (+10.4%). The first phase of the trade deal between the U.S. and China was certainly a contributor to the global equities rally in the quarter, as was the perceived lower risk of global recession heading into 2020. Information Technology was the best performing sector in the quarter, up 14.6%, followed by Health Care (+13.8%), Materials (+9.4%), and Financials (9.0%). Communication Services, up 8.3%, closed out the Top 5.

Selected holdings that contributed positively to performance in 2019 were:

Facebook Inc. (4.2% of net assets as of December 31, 2019) is an online social networking and social media service with over 2.4 billion monthly active users. Revenues were up 29% year over year to $17.6 billion, while operating margin was at 41%. Daily active users were up 9% (to 2.45 billion); Comcast Corp. (4.6%) is a television and broadband provider in the U.S., UK, Italy and Germany. The introduction of the industry leading X1 platform has helped Comcast gain video subscribers in the US while a reinvestment in content and more focused leadership have improved NBC’s viewership and profitability; and Alphabet Inc. (5.1%) is an umbrella company whose subsidiaries include the core Google business (the Google search engine and related ad revenue, Android, YouTube) as well as multiple independent companies, such as Google Ventures, Waymo, and Verily. Total revenue was up 20%. At Google (core business), website revenue was up 19% (to $29 billion), led by an 18% improvement in paid clicks, with the cost per click falling by 2% due to the mix shift towards mobile search.

Some of our weaker performing stocks during the year:

Telephone and Data Systems (2.0%) provides wireless, cable and wireline broadband, TV, voice, and hosted and managed services in the United States. Down largely due to investor disappointment that USM is

2

not planning to sell its wireless towers in the near term and weaker than expected postpaid wireless net additions were a contributing factor as well; U.S. Cellular Corp. (1.6%) is a mobile network operator which owns and operates the fifth largest wireless telecommunications network in the U.S. Share weakness was largely driven by wide 2019 EBITDA guidance range; and Uniti Group Inc. (no longer held) an internally managed real estate investment trust, and is a leading provider of wireless infrastructure solutions for the communications industry. The company was impacted by its largest tenant, Windstream, filing for bankruptcy in early 2019 as well as by the ongoing dispute about the nature of Windstream’s lease and risk that related master lease payments might be reduced.

Thank you for your investment in The Gabelli Global Content and Connectivity Fund.

We appreciate your confidence and trust.

Comparative Results

Average Annual Returns through December 31, 2019 (a) (Unaudited)

	1 Year			5 Year			10 Year			15 Year			Since Inception (11/1/93)
Class AAA (GABTX)		15.62	%		2.95	%		5.03	%		4.36	%		6.88	%
MSCI AC World Telecommunication Services Index (b)		25.09			4.97			6.72			5.97			N/A
MSCI AC World Index		26.60			8.41			8.79			6.86			7.20	(c)
Class A (GTCAX)		15.64			2.92			5.01			4.35			6.87
With sales charge (d)		8.99			1.71			4.39			3.94			6.63
Class C (GTCCX)		14.81			2.19			4.25			3.58			6.28
With contingent deferred sales charge (e)		13.81			2.19			4.25			3.58			6.28
Class I (GTTIX)		16.42			3.50			5.44			4.67			7.06

In the current prospectuses dated April 30, 2019, as amended by the supplement dated December 3, 2019, the gross expense ratios for Class AAA, A, C, and I Shares are 1.73%, 1.73%, 2.48%, and 1.48%, respectively, and the net expense ratio for all share classes after contractual reimbursements by Gabelli Funds, LLC, (the Adviser) is 0.91%. See page 13 for the expense ratios for the year ended December 31, 2019. The contractual reimbursements are in effect through April 30, 2021. Class AAA and Class I Shares do not have a sales charge. The maximum sales charge for Class A Shares, and Class C Shares is 5.75%, and 1.00%, respectively.

(a) Returns represent past performance and do not guarantee future results. Total returns and average annual returns reflect changes in share price, reinvestment of distributions, and are net of expenses. Investment returns and the principal value of an investment will fluctuate. When shares are redeemed, they may be worth more or less than their original cost. Current performance may be lower or higher than the performance data presented. Visit www.gabelli.com for performance information as of the most recent month end. Returns for Class I Shares would have been lower had the Adviser not reimbursed certain expenses. The Fund imposes a 2% redemption fee on shares sold or exchanged within seven days of purchase. Investors should carefully consider the investment objectives, risks, charges, and expenses of the Fund before investing. The prospectuses contain information about these and other matters and should be read carefully before investing. To obtain a prospectus, please visit our website at www.gabelli.com.Investing in foreign securities involves risks not ordinarily associated with investments in domestic issues, including currency fluctuation, economic, and political risks. The Class AAA Share NAVs are used to calculate performance for the periods prior to the issuance of Class A Shares, Class C Shares, and Class I Shares on March 12, 2000, June 2, 2000, and January 11, 2008, respectively. The actual performance for the Class A Shares and Class C Shares would have been lower due to the additional fees and expenses associated with these classes of shares. The actual performance of the Class I Shares would have been higher due to lower expenses related to this class of shares. The MSCI AC World Telecommunication Services Index is an unmanaged index that measures the performance of the global telecommunication securities from around the world. The MSCI AC World Index is an unmanaged market capitalization weighted index that is designed to measure the equity market performance of developed and emerging markets. The MSCI AC World Index consists of 45 country indices comprising 24 developed and 21 emerging market country indices. Dividends are considered reinvested. You cannot invest directly in an index.

(b) MSCI AC World Telecommunication Services Index name changed to MSCI AC World Communication Services Index.

(c) The MSCI AC World Index since inception performance is as of October 31, 1993.

(d) Performance results include the effect of the maximum 5.75% sales charge at the beginning of the period.

(e) Assuming payment of the 1% maximum contingent deferred sales charge imposed on redemptions made within one year of purchase.

3

COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN

THE GABELLI GLOBAL CONTENT & CONECTIVITY FUND (CLASS AAA SHARES)

AND MSCI AC WORLD INDEX (Unaudited)

* Past performance is not predictive of future results. The performance tables and graph do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares.

4

The Gabelli Global Content & Connectivity Fund

Disclosure of Fund Expenses (Unaudited)
For the Six Month Period from July 1, 2019 through December 31, 2019	Expense Table

We believe it is important for you to understand the impact of fees and expenses regarding your investment. All mutual funds have operating expenses. As a shareholder of a fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund’s gross income, directly reduce the investment return of a fund. When a fund’s expenses are expressed as a percentage of its average net assets, this figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your Fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The Expense Table below illustrates your Fund’s costs in two ways:

Actual Fund Return:This section provides information about actual account values and actual expenses. You may use this section to help you to estimate the actual expenses that you paid over the period after any fee waivers and expense reimbursements. The “Ending Account Value” shown is derived from the Fund’sactualreturn during the past six months, and the “Expenses Paid During Period” shows the dollar amount that would have been paid by an investor who started with $1,000 in the Fund. You may use this information, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your Fund under the heading “Expenses Paid During Period” to estimate the expenses you paid during this period.

Hypothetical 5% Return:This section provides information about hypothetical account values and hypothetical expenses based on the Fund’s actual expense

ratio. It assumes a hypothetical annualized return of 5% before expenses during the period shown. In this case – because the hypothetical return used isnotthe Fund’s actual return – the results do not apply to your investment and you cannot use the hypothetical account value and expense to estimate the actual ending account balance or expenses you paid for the period. This example is useful in making comparisons of the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs such as sales charges (loads), redemption fees, or exchange fees, if any, which are described in the Prospectus. If these costs were applied to your account, your costs would be higher. Therefore, the 5% hypothetical return is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. The “Annualized Expense Ratio” represents the actual expenses for the last six months and may be different from the expense ratio in the Financial Highlights which is for the year ended December 31, 2019.

	Beginning Account Value 07/01/19	Ending Account Value 12/31/19	Annualized Expense Ratio		Expenses Paid During Period*
The Gabelli Global Content & Connectivity Fund
Actual Fund Return
Class AAA	$1,000.00	$1,041.60		1.63%		$   8.39
Class A	$1,000.00	$1,041.10		1.62%		$   8.33
Class C	$1,000.00	$1,038.00		2.31%		$ 11.87
Class I	$1,000.00	$1,044.80		0.98%		$   5.05
Hypothetical 5% Return
Class AAA	$1,000.00	$1,016.99		1.63%		$   8.29
Class A	$1,000.00	$1,017.04		1.62%		$   8.24
Class C	$1,000.00	$1,013.56		2.31%		$ 11.72
Class I	$1,000.00	$1,020.27		0.98%		$   4.99

* Expenses are equal to the Fund’s annualized expense ratio for the last six months multiplied by the average account value over the period, multiplied by the number of days in the most recent fiscal half year (184 days), then divided by 365.

5

Summary of Portfolio Holdings (Unaudited)

The following table presents portfolio holdings as a percent of net assets as of December 31, 2019:

The Gabelli Global Content & Connectivity Fund

Communication Services	81.0	%
Information Technology	6.0	%
Consumer Discretionary	3.9	%
Financials	3.9	%
Real Estate	2.3	%
U.S. Government Obligations	1.2	%
Industrials	0.8	%

Health Care	0.8	%
Consumer Staples	0.2	%
Utilities	0.0	%*
Other Assets and Liabilities (Net)	(0.1	)%
	100.0	%

* Amount represents less than 0.05%.

The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission (the SEC) for the first and third quarters of each fiscal year on FormN-PORT. Shareholders may obtain this information at www.gabelli.com or by calling the Fund at800-GABELLI(800-422-3554). The Fund’s FormN-PORT is available on the SEC’s website at www.sec.gov and may also be reviewed and copied at the SEC’s Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling800-SEC-0330.

Proxy Voting

The Fund files FormN-PX with its complete proxy voting record for the twelve months ended June 30, no later than August 31 of each year. A description of the Fund’s proxy voting policies, procedures, and how the Fund voted proxies relating to portfolio securities is available without charge, upon request, by (i) calling800-GABELLI(800-422-3554); (ii) writing to The Gabelli Funds at One Corporate Center, Rye, NY 10580-1422; or (iii) visiting the SEC’s website at www.sec.gov.

6

The Gabelli Global Content & Connectivity Fund

Schedule of Investments — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS — 98.1%
		COMMUNICATION SERVICES — 80.3%
		Telecommunication Services — 41.8%
		Wireless Telecommunication Services — 18.7%
		Wireless Telecommunication Services — 18.7%
	62,500	America Movil SAB de CV, Cl. L, ADR	$	210,700	$	1,000,000
	4,500	Anterix Inc.†		166,779		194,445
	10,000	Axiata Group Berhad		7,116		10,121
	9,500	China Mobile Ltd., ADR		113,184		401,565
	72,808	Econet Wireless Zimbabwe Ltd.†		21,788		6,373
	17,500	Gogo Inc.†		93,514		112,000
	666	Hutchison Telecommunications Hong Kong Holdings Ltd.		63		134
	49,000	KDDI Corp.		386,824		1,467,001
	23,292	Millicom International Cellular SA, SDR		1,232,638		1,115,567
	16,200	NTT DOCOMO Inc.		251,251		452,953
	18,000	PLDT Inc., ADR		242,214		359,820
	240,000	PT Indosat Tbk†		38,553		50,308
	11,500	Rogers Communications Inc., Cl. B		37,946		571,205
	3,500	Shenandoah Telecommunications Co.		7,917		145,635
	45,000	Sistema PJSC FC, GDR		228,379		219,330
	14,000	SK Telecom Co. Ltd., ADR		213,315		323,540
	20,000	SoftBank Group Corp.		721,385		875,431
	40,000	Sprint Corp.†		202,752		208,400
	60,000	TIM Participacoes SA		123,340		233,724
	55,500	T-Mobile US Inc.†		1,546,591		4,352,310
	56,000	Turkcell Iletisim Hizmetleri A/S, ADR		277,945		324,800
	33,800	United States Cellular Corp.†		1,126,509		1,224,574
	140,000	VEON Ltd., ADR		223,340		354,200
	31,000	Vodafone Group plc, ADR		654,169		599,230
				8,128,212		14,602,666
		Diversified Telecommunication Services — 23.1%
		Integrated Telecommunication Services — 19.9%
	9,500	AT&T Inc.		193,967		371,260
	1,900	ATN International Inc.		5,893		105,241
	37,415,054	Cable & Wireless Jamaica Ltd.†(a)		499,070		409,347
	16,400	China Unicom Hong Kong Ltd., ADR		104,722		153,504
	44,000	Cincinnati Bell Inc.†		289,030		460,680
	101,000	Deutsche Telekom AG, ADR		1,836,835		1,645,290
	3,107	Hellenic Telecommunications Organization SA		43,544		49,698
	2,000	Hellenic Telecommunications Organization SA, ADR		16,157		16,140
	15,000	Koninklijke KPN NV		39,437		44,268

Shares			Cost		Market Value
	26,000	Maroc Telecom	$	426,215	$	417,050
	18,000	Nippon Telegraph & Telephone Corp.		165,752		456,730
	2,000	Nippon Telegraph & Telephone Corp., ADR		38,489		101,000
	20,500	Nuvera Communications Inc.		227,926		389,500
	453	Oi SA, Cl. C, ADR†		1,724		422
	2,000	Orange SA, ADR		28,867		29,180
	200,000	Pakistan Telecommunication Co. Ltd.		29,365		12,088
	90,000	PCCW Ltd.		74,681		53,245
	6,400	Proximus SA		185,008		183,206
	9,700	PT Telekomunikasi Indonesia Persero Tbk, ADR		21,613		276,450
	3,000	Rostelecom PJSC, ADR		20,044		22,515
	180,000	Singapore Telecommunications Ltd.		136,646		451,020
	9,800	Swisscom AG, ADR		235,828		517,979
	18,000	Telecom Argentina SA, ADR		66,803		204,300
	11,500	Telecom Italia SpA, ADR†		86,914		71,070
	5,021	Telefonica Brasil SA, ADR		27,844		71,901
	3,935	Telefonica SA		58,513		27,485
	77,000	Telefonica SA, ADR		246,054		536,690
	70,000	Telekom Austria AG		498,397		571,621
	123,000	Telekom Malaysia Berhad		114,886		114,866
	36,300	Telenor ASA		515,432		651,013
	60,000	Telephone & Data Systems Inc.		1,141,189		1,525,800
	128,000	Telesites SAB de CV†		97,176		94,777
	259,000	Telia Co. AB		556,485		1,113,000
	26,000	TELUS Corp.		284,822		1,006,980
	405,000	True Corp. Public Co. Ltd.		61,287		62,196
	53,300	Verizon Communications Inc.		1,673,375		3,272,620
				10,049,990		15,490,132
		Alternative Carriers — 3.2%
	106,000	CenturyLink Inc.		1,695,738		1,400,260
	300	Iliad SA		29,953		38,884
	22,500	Intelsat SA†		360,317		158,175
	28,000	TIME dotCom Berhad		56,823		63,112
	25,000	Zayo Group Holdings Inc.†		716,486		866,250
				2,859,317		2,526,681
		Media & Entertainment — 38.5%
		Media — 25.9%
		Cable & Satellite — 13.9%
	6,200	Cogeco Inc.		120,942		496,983
	79,800	Comcast Corp., Cl. A		2,430,616		3,588,606
	28,461	DISH Network Corp., Cl. A†		553,488		1,009,512
	280,000	Dish TV India Ltd., GDR†		271,241		28,000
	3,500	GCI Liberty Inc., Cl. A†		19,375		247,975
	184,000	Grupo Televisa SAB, ADR		2,266,000		2,158,320
	1,025	Liberty Broadband Corp., Cl. A†		1,876		127,674

See accompanying notes to financial statements.

7

The Gabelli Global Content & Connectivity Fund

Schedule of Investments (Continued) — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS (Continued)
		COMMUNICATION SERVICES (Continued)
		Media & Entertainment (Continued)
		Media (Continued)
		Cable & Satellite (Continued)
	1,000	Liberty Broadband Corp., Cl. C†	$	3,616	$	125,750
	14,840	Liberty Global plc, Cl. A†		181,787		337,462
	58,600	Liberty Global plc, Cl. C†		706,948		1,277,187
	1,000	Liberty Latin America Ltd., Cl. A†		13,803		19,300
	3,444	Liberty Latin America Ltd., Cl. C†		36,730		67,020
	15,500	Liberty Media Corp. - Liberty
		SiriusXM, Cl. A†		537,457		749,270
	12,000	Liberty Media Corp. - Liberty
		SiriusXM, Cl. C†		474,012		577,680
	2,000	MultiChoice Group†		13,807		16,636
				7,631,698		10,827,375
				��
		Broadcasting — 12.0%
	1,400	AMC Networks Inc., Cl. A†		28,458		55,300
	300,000	Corus Entertainment Inc., Cl. B		1,099,064		1,229,063
	18,000	Discovery Inc., Cl. A†		337,965		589,320
	85,000	Discovery Inc., Cl. C†		1,672,913		2,591,650
	55,666	Fox Corp., Cl. B.		2,078,388		2,026,242
	11,000	MSG Networks Inc., Cl. A†		67,634		191,400
	3,000	Nordic Entertainment Group AB, Cl. B		63,636		96,985
	6,000	Sinclair Broadcast Group Inc., Cl. A		175,753		200,040
	9,000	Tokyo Broadcasting System Holdings Inc.		114,490		154,563
	54,070	ViacomCBS Inc., Cl. B		2,494,517		2,269,318
				8,132,818		9,403,881
		Interactive Media & Services — 9.4%
		Interactive Media & Services — 9.4%
	3,000	Alphabet Inc., Cl. C†		3,121,332		4,011,060
	16,000	Facebook Inc., Cl. A†		2,638,926		3,284,000
				5,760,258		7,295,060
		Entertainment — 3.2%
		Movies & Entertainment — 2.7%
	1,600	Liberty Media Corp.- Liberty Braves, Cl. A†		39,285		47,440
	10,500	Liberty Media Corp.- Liberty Braves, Cl. C†		206,736		310,170
	950	Liberty Media Corp.- Liberty Formula One, Cl. A†		1,143		41,591
	2,000	Liberty Media Corp.- Liberty Formula One, Cl. C†		4,491		91,930
	100	Netflix Inc.†		28,468		32,357
	4,000	The Madison Square Garden Co., Cl. A†		514,978		1,176,760
	2,674	The Walt Disney Co.		138,858		386,741
				933,959		2,086,989

Shares			Cost		Market Value
		Interactive Home Entertainment — 0.5%
	3,000	Modern Times Group MTG AB, Cl. B†	$	45,669	$	35,761
	3,000	Take-Two Interactive Software Inc.†		293,129		367,290
			338,798		403,051
		TOTAL COMMUNICATION SERVICES		43,835,050		62,635,835
		INFORMATION TECHNOLOGY — 6.0%
		Technology Hardware & Equipment — 1.7%
		Technology Hardware, Storage & Peripherals — 1.3%
		Technology hardware, Storage & Peripherals — 1.3%
	3,500	Apple Inc.		559,163		1,027,775
		Electronic Equipment, Instruments & Components — 0.1%
		Electronic Equipment & Instruments — 0.1%
	1,000	Sony Corp., ADR		52,638		68,000
		Communications Equipment — 0.3%
		Communications Equipment — 0.3%
	5,000	EchoStar Corp., Cl. A†		109,544		216,550
		Software & Services — 3.6%
		Software — 1.0%
		Systems Software — 0.4%
	2,000	Microsoft Corp.		152,364		315,400
		Application Software — 0.6%
	35,000	MiX Telematics Ltd., ADR		593,390		453,950
		IT Services — 2.6%
		IT Consulting & Other Services — 1.3%
	56,062	Cassava SmarTech Zimbabwe Ltd.†		85,775		4,678
	12,000	InterXion Holding NV†		145,827		1,005,720
				231,602		1,010,398
		Data Processing & Outsourced Services — 1.3%
	2,000	Mastercard Inc., Cl. A		292,729		597,180
	2,000	Visa Inc., Cl. A		218,924		375,800
				511,653		972,980
		Semiconductors & Semiconductor Equipment — 0.7%
		Semiconductors & Semiconductor Equipment — 0.7%
		Semiconductors — 0.7%
	15,000	SMART Global Holdings Inc.†		401,880		569,100
		TOTAL INFORMATION TECHNOLOGY		2,612,234		4,634,153
		FINANCIALS — 3.9%
		Diversified Financials — 3.9%
		Diversified Financial Services — 3.1%
		Multi-Sector Holdings — 3.1%
	97,500	First Pacific Co. Ltd.		48,559		33,158

See accompanying notes to financial statements.

8

The Gabelli Global Content & Connectivity Fund

Schedule of Investments (Continued) — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS (Continued)
		FINANCIALS (Continued)
		Diversified Financials (Continued)
		Diversified Financial Services (Continued)
		Multi-Sector Holdings (Continued)
	4,100	First Pacific Co. Ltd., ADR	$	3,337	$	6,806
	1,000	Kinnevik AB, Cl. A		33,558		25,463
	96,000	Kinnevik AB, Cl. B		2,341,640		2,347,126
	12,000	Waterloo Investment Holdings Ltd.†(a)		1,432		2,520
				2,428,526		2,415,073
		Consumer Finance — 0.8%
		Consumer Finance — 0.8%
	5,000	American Express Co.		471,162		622,450
		TOTAL FINANCIALS		2,899,688		3,037,523
		CONSUMER DISCRETIONARY —3.8%
		Retailing — 2.6%
		Internet & Direct Marketing Retail — 2.6%
		Internet & Direct Marketing Retail — 2.6%
	72	Expedia Group Inc.		6,881		7,786
	8,600	Naspers Ltd., Cl. N		1,883,150		1,406,597
	8,600	Prosus NV†		721,572		641,792
	2,000	Qurate Retail Inc., Cl. A†		15,202		16,860
				2,626,805		2,073,035
		Automobiles & Components — 1.2%
		Automobiles — 1.2%
		Automobile Manufacturers — 1.2%
	25,000	General Motors Co.		862,082		915,000
		TOTAL CONSUMER DISCRETIONARY		3,488,887		2,988,035
		REAL ESTATE — 2.3%
		Real Estate — 2.3%
		Real Estate Management & Development — 0.3%
		Real Estate Development — 0.3%
	27,360	CK Asset Holdings Ltd.		150,629		197,503
		Equity Real Estate Investment Trusts — 2.0%
		Specialized REITs — 2.0%
	2,000	CyrusOne Inc., REIT		24,800		130,860
	2,500	Equinix Inc., REIT		227,567		1,459,250
				252,367		1,590,110
		TOTAL REAL ESTATE		402,996		1,787,613
		INDUSTRIALS — 0.8%
		Commercial & Professional Services — 0.1%
		Commercial Services & Supplies — 0.1%
		Security & Alarm Services — 0.1%
	30,000	G4S plc		0		86,629
	900	Marlowe plc†		521		6,050
				521		92,679

Shares			Cost		Market Value
		Capital Goods — 0.7%
		Industrial Conglomerates — 0.3%
		Industrial Conglomerates — 0.3%
	27,360	CK Hutchison Holdings Ltd.	$	245,763	$	260,879
		Electrical Equipment — 0.1%
		Electrical Components & Equipment — 0.1%
	1,800	Furukawa Electric Co. Ltd.		53,735		46,717
		Construction & Engineering — 0.3%
		Construction & Engineering — 0.3%
	6,000	Bouygues SA		167,997		254,941
		TOTAL INDUSTRIALS		468,016		655,216
		HEALTH CARE — 0.8%
		Health Care Equipment & Services — 0.8%
		Health Care Equipment & Supplies — 0.8%
		Health Care Equipment — 0.8%
	13,000	GN Store Nord A/S		76,744		611,377
		CONSUMER STAPLES — 0.2%
		Food, Beverage & Tobacco — 0.2%
		Food Products — 0.2%
		Agricultural Products — 0.2%
	68,000	C.P. Pokphand Co. Ltd., ADR		52,895		136,680
		Beverages — 0.0%
		Distillers & Vintners — 0.0%
	1,768	Gusbourne plc†		1,486		1,991
		Food & Staples Retailing — 0.0%
		Food & Staples Retailing — 0.0%
		Food Retail — 0.0%
	504	Meikles Ltd.		203		75
		TOTAL CONSUMER STAPLES		54,584		138,746
		UTILITIES — 0.0%
		Utilities — 0.0%
		Multi-Utilities — 0.0%
		Multi-Utilities — 0.0%
	200	National Grid plc, ADR		10,528		12,534
		TOTAL COMMON STOCKS		53,848,727		76,501,032
		CLOSED-END FUNDS — 0.1%
		CONSUMER DISCRETIONARY — 0.1%
		Retailing — 0.1%
		Internet & Direct Marketing Retail — 0.1%
		Internet & Direct Marketing Retail — 0.1%
	5,800	Altaba Inc., Escrow†		0		120,350

See accompanying notes to financial statements.

9

The Gabelli Global Content & Connectivity Fund

Schedule of Investments (Continued) — December 31, 2019

Shares			Cost		Market Value
		WARRANTS — 0.7%
		COMMUNICATION SERVICES — 0.7%
		Telecommunication Services — 0.7%
		Wireless Telecommunication Services — 0.7%
		Wireless Telecommunication Services — 0.7%
	81,000	Bharti Airtel Ltd., expire 11/30/20†(b)	$	443,540	$	517,590
Principal Amount
		CORPORATE BONDS — 0.0%
		COMMUNICATION SERVICES — 0.0%
		Telecommunication Services — 0.0%
		Wireless Telecommunication Services — 0.0%
		Wireless Telecommunication Services — 0.0%
	$ 32,808	Econet Wireless Zimbabwe Ltd., 5.000%, 03/17/23(a)		1,768		1,532
		U.S. GOVERNMENT OBLIGATIONS — 1.2%
	939,000	U.S. Treasury Bills, 1.531% to 1.557%††, 02/13/20 to 02/27/20		937,045		937,129
		TOTAL INVESTMENTS —100.1%	$	55,231,080		78,077,633
		Other Assets and Liabilities (Net) — (0.1)%				(100,290	)
		NET ASSETS — 100.0%			$	77,977,343

(a) Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

(b) Security exempt from registration under Rule 144A of the Securities Act of 1933, as amended. This security may be resold in transactions exempt from registration, normally to qualified institutional buyers.

† Non-income producing security.

†† Represents annualized yields at dates of purchase.

ADR American Depositary Receipt

GDR Global Depositary Receipt

REIT Real Estate Investment Trust

SDR Swedish Depositary Receipt

Geographic Diversification	%of Market Value			Market Value
North America		63.3	%	$	49,431,624
Europe		19.9			15,547,950
Latin America		5.4			4,175,311
Japan		4.6			3,622,395
Asia/Pacific		3.8			2,994,995
Africa/Middle East		3.0			2,305,358
		100.0	%	$	78,077,633

See accompanying notes to financial statements.

10

The Gabelli Global Content & Connectivity Fund

Statement of Assets and Liabilities December 31, 2019
Assets:
Investments, at value (cost $55,231,080)	$78,077,633
Foreign currency, at value (cost $1,911)	1,264
Receivable for Fund shares sold	7,575
Receivable from Adviser	30,943
Dividends receivable	90,797
Prepaid expenses	28,843
Total Assets	78,237,055
Liabilities:
Payable to custodian	20,919
Payable for Fund shares redeemed	19,817
Payable for investment advisory fees	65,784
Payable for distribution fees	13,857
Payable for accounting fees	11,250
Payable for legal and audit fees	54,427
Payable for shareholder communications expenses	42,568
Payable for shareholder services fees	19,896
Other accrued expenses	11,194
Total Liabilities	259,712
Net Assets (applicable to 3,972,680 shares outstanding)	$77,977,343
Net Assets Consist of:
Paid-in capital	$56,067,590
Total distributable earnings	21,909,753
Net Assets	$77,977,343

Shares of Capital Stock, each at $0.001 par value:
Class AAA:
Net Asset Value, offering, and redemption price per share ($65,024,198 ÷ 3,311,189 shares outstanding; 150,000,000 shares authorized)	$19.64
Class A:
Net Asset Value and redemption price per share ($373,605 ÷ 18,860 shares outstanding; 50,000,000 shares authorized)	$19.81
Maximum offering price per share (NAV ÷ 0.9425, based on maximum sales charge of 5.75% of the offering price)	$21.02
Class C:
Net Asset Value and offering price per share ($84,556 ÷ 4,420 shares outstanding; 50,000,000 shares authorized)	$19.13	(a)
Class I:
Net Asset Value, offering, and redemption price per share ($12,494,984 ÷ 638,211 shares outstanding; 50,000,000 shares authorized)	$19.58

Statement of Operations For the Year Ended December 31, 2019
Investment Income:
Dividends (net of foreign withholding taxes of $115,353)	$	1,340,940
Income fromnon-cash dividends		1,268,866
Interest		23,302
Total Investment Income		2,633,108
Expenses:
Investment advisory fees		791,487
Distribution fees - Class AAA		164,815
Distribution fees - Class A		796
Distribution fees - Class C		1,800
Shareholder services fees		84,635
Shareholder communications expenses		80,773
Legal and audit fees		56,973
Registration expenses		48,037
Accounting fees		45,000
Custodian fees		32,377
Directors’ fees		18,724
Interest expense		1,335
Miscellaneous expenses		17,357
Total Expenses		1,344,109
Less:
Expenses paid indirectly by broker (See Note 6)		(689	)
Expense reimbursements (See Note 3)		(91,150	)
Total Credits and Reimbursements		(91,839	)
Net Expenses		1,252,270
Net Investment Income		1,380,838
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency:
Net realized gain on investments		3,393,353
Net realized loss on foreign currency transactions		(6,130	)
Net realized gain on investments and foreign currency transactions		3,387,223
Net change in unrealized appreciation/depreciation:
on investments		6,765,388
on foreign currency translations		(263	)
Net change in unrealized appreciation/depreciation on investments and foreign currency translations		6,765,125
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency		10,152,348
Net Increase in Net Assets Resulting from Operations	$	11,533,186

(a) Redemption price varies based on the length of time held.

See accompanying notes to financial statements.

11

The Gabelli Global Content & Connectivity Fund

Statement of Changes in Net Assets

	Year Ended December 31, 2019				Year Ended December 31, 2018
Operations:
Net investment income		$	1,380,838			$	800,143
Net realized gain on investments and foreign currency transactions			3,387,223				3,939,456
Net change in unrealized appreciation/depreciation on investments and foreign currency translations			6,765,125				(15,398,677	)
Net Increase/(Decrease) in Net Assets Resulting from Operations			11,533,186				(10,659,078	)
Distributions to Shareholders:
Accumulated earnings
Class AAA			(3,972,615	)			(3,588,419	)
Class A			(22,666	)			(12,799	)
Class C			(3,829	)			(14,569	)
Class I			(855,412	)			(802,477	)
			(4,854,522	)			(4,418,264	)
Return of capital
Class AAA			—				(33,667	)
Class A			—				(120	)
Class C			—				(137	)
Class I			—				(7,529	)
			—				(41,453	)
Total Distributions to Shareholders			(4,854,522	)			(4,459,717	)
Capital Share Transactions:
Class AAA			(3,728,999	)			(6,132,278	)
Class A			127,427				(294,869	)
Class C			(221,139	)			63,433
Class I			(979,121	)			533,982
Class T*			—				(1,038	)
Net Decrease in Net Assets from Capital Share Transactions			(4,801,832	)			(5,830,770	)
Redemption Fees			25				113
Net Increase/(Decrease) in Net Assets			1,876,857				(20,949,452	)
Net Assets:
Beginning of year			76,100,486				97,049,938
End of year		$	77,977,343			$	76,100,486

* Class T Shares were liquidated on September 21, 2018.

See accompanying notes to financial statements.

12

The Gabelli Global Content & Connectivity Fund

Financial Highlights

Selected data for a share of capital stock outstanding throughout each year:

		Income (Loss) from Investment Operations							Distributions													Ratios to Average Net Assets/ Supplemental Data
Year Ended December 31	Net Asset Value, Beginning of Year	Net Investment Income (Loss)(a)	Net Realized and Unrealized Gain (Loss) on Investments			Total from Investment Operations			Net Investment Income		Net Realized Gain		Return of Capital		Total Distributions		Redemption Fees(a)(b)		Net Asset Value, End of Year		Total Return†	Net Assets End of Year (in 000’s)		Net Investment Income (Loss)			Operating Expenses Before Reimbursement		Operating Expenses Net of Reimbursement(c)		Portfolio Turnover Rate
Class AAA
2019	$18.08	$0.32(d)		$ 2.51			$ 2.83			$(0.37)		$(0.90)		—		$(1.27)		$0.00		$19.64	15.6%	$	65,024		1.63	%(d)		1.74%		1.69%(e)		14%
2018	21.77	0.16		(2.76	)		(2.60	)		(0.15)		(0.93)		$(0.01)		(1.09)		0.00		18.08	(11.9)		63,196		0.78			1.72		1.72		19
2017	20.43	0.11		2.63			2.74			(0.14)		(1.26)		—		(1.40)		—		21.77	13.4		81,832		0.48			1.73		1.73		22
2016	21.30	0.27		0.29			0.56			(0.28)		(1.13)		(0.02)		(1.43)		0.00		20.43	2.7		87,893		1.23			1.65		1.65(f)		9
2015	23.63	0.26		(0.82	)		(0.56	)		(0.27)		(1.49)		(0.01)		(1.77)		0.00		21.30	(2.5)		101,187		1.08			1.63		1.63		5
Class A
2019	$18.23	$0.36(d)		$ 2.50			$ 2.86			$(0.38)		$(0.90)		—		$(1.28)		$0.00		$19.81	15.6%	$	374		1.80	%(d)		1.74%		1.68%(e)		14%
2018	21.94	0.16		(2.79	)		(2.63	)		(0.14)		(0.93)		$(0.01)		(1.08)		0.00		18.23	(11.9)		231		0.76			1.72		1.72		19
2017	20.58	0.10		2.66			2.76			(0.14)		(1.26)		—		(1.40)		—		21.94	13.4		576		0.43			1.73		1.73		22
2016	21.29	0.15		0.38			0.53			(0.09)		(1.13)		(0.02)		(1.24)		0.00		20.58	2.5		661		0.68			1.65		1.65(f)		9
2015	23.61	0.26		(0.81	)		(0.55	)		(0.27)		(1.49)		(0.01)		(1.77)		0.00		21.29	(2.5)		846		1.08			1.63		1.63		5
Class C
2019	$17.45	$0.04(d)		$ 2.55			$ 2.59			$(0.01)		$(0.90)		—		$(0.91)		$0.00		$19.13	14.8%	$	84		0.19	%(d)		2.49%		2.45%(e)		14%
2018	21.08	0.02		(2.68	)		(2.66	)		(0.03)		(0.93)		$(0.01)		(0.97)		0.00		17.45	(12.6)		279		0.08			2.47		2.47		19
2017	19.85	(0.06)		2.55			2.49			—		(1.26)		—		(1.26)		—		21.08	12.5		267		(0.28	)		2.48		2.48		22
2016	20.71	0.09		0.30			0.39			(0.10)		(1.13)		(0.02)		(1.25)		0.00		19.85	1.9		328		0.42			2.40		2.40(f)		9
2015	22.98	0.08		(0.79	)		(0.71	)		(0.06)		(1.49)		(0.01)		(1.56)		0.00		20.71	(3.2)		441		0.36			2.38		2.38		5
Class I
2019	$18.03	$0.46(d)		$ 2.51			$ 2.97			$(0.52)		$(0.90)		—		$(1.42)		$0.00		$19.58	16.4%	$	12,495		2.33	%(d)		1.49%		0.99%(e)		14%
2018	21.75	0.32		(2.79	)		(2.47	)		(0.31)		(0.93)		$(0.01)		(1.25)		0.00		18.03	(11.3)		12,394		1.52			1.47		1.00(e)		19
2017	20.40	0.28		2.62			2.90			(0.29)		(1.26)		—		(1.55)		—		21.75	14.2		14,374		1.26			1.48		1.00(e)		22
2016	21.27	0.30		0.33			0.63			(0.35)		(1.13)		(0.02)		(1.50)		0.00		20.40	3.0		6,361		1.41			1.40		1.35(e)(f)		9
2015	23.60	0.30		(0.79	)		(0.49	)		(0.34)		(1.49)		(0.01)		(1.84)		0.00		21.27	(2.2)		1,842		1.26			1.38		1.38		5

† Total return represents aggregate total return of a hypothetical $1,000 investment at the beginning of the year and sold at the end of the year including reinvestment of distributions and does not reflect the applicable sales charges.

(a) Per share amounts have been calculated using the average shares outstanding method.

(b) Amount represents less than $0.005 per share.

(c) The Fund received credits from a designated broker who agreed to pay certain Fund operating expenses. For the years ended December 31, 2019, 2018, 2017, 2016, and 2015, there was no impact to the expense ratios.

(d) Includes income resulting from special dividends. Without these dividends, the per share income amounts would have been 0.01 (Class AAA), 0.04 (Class A), (0.27) (Class C), and 0.15 (Class I), and the net investment income ratio would have been 0.03% (Class AAA), 0.19% (Class A), (1.41%) (Class C), and 0.73% (Class I), respectively.

(e) Under an expense reimbursement agreement with the Adviser, the Adviser reimbursed expenses of $91,150 for the year ended December 31, 2019 and certain Class I expenses to the Fund of $70,600, $56,231, and $899 for the years ended December 31, 2018, 2017, and 2016, respectively.

(f) During the year ended December 31, 2016, the Fund received reimbursements of custody expenses paid in prior years. Had such reimbursement (allocated by relative net asset values of the Fund’s share classes) been included in that period, the expense ratios would have been 1.22% (Class AAA), 1.54% (Class A), 1.99% (Class C), and 0.95% (Class I).

See accompanying notes to financial statements.

13

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements

1. Organization.The Gabelli Global Content & Connectivity Fund, a series of GAMCO Global Series Funds, Inc. (the Corporation), was incorporated on July 16, 1993 in Maryland. The Fund is anon-diversifiedopen-end management investment company registered under the Investment Company Act of 1940, as amended (the 1940 Act), and is one of five separately managed portfolios (collectively, the Portfolios) of the Corporation. The Fund’s primary objective is capital appreciation. The Fund commenced investment operations on November 1, 1993.

The Fund may invest a high percentage of its assets in specific sectors of the market in order to achieve a potentially greater investment return. As a result, the Fund may be more susceptible to economic, political, and regulatory developments in a particular sector of the market, positive or negative, and may experience increased volatility to the Fund’s NAV and a magnified effect in its total return.

2. Significant Accounting Policies.As an investment company, the Fund follows the investment company accounting and reporting guidance, which is part of U.S. generally accepted accounting principles (GAAP) that may require the use of management estimates and assumptions in the preparation of its financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

New Accounting Pronouncements.To improve the effectiveness of fair value disclosure requirements, the Financial Accounting Standards Board recently issued Accounting Standard Update (ASU)2018-13, Fair Value Measurement Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU2018-13), which adds, removes, and modifies certain aspects relating to fair value disclosure. ASU2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption of the additions relating to ASU2018-13 is not required, even if early adoption is elected for the removals and modifications under ASU2018-13. Management has early adopted the removals and modifications set forth in ASU2018-13 in these financial statements and has not early adopted the additions set forth in ASU2018-13.

Security Valuation.Portfolio securities listed or traded on a nationally recognized securities exchange or traded in the U.S.over-the-counter market for which market quotations are readily available are valued at the last quoted sale price or a market’s official closing price as of the close of business on the day the securities are being valued. If there were no sales that day, the security is valued at the average of the closing bid and asked prices or, if there were no asked prices quoted on that day, then the security is valued at the closing bid price on that day. If no bid or asked prices are quoted on such day, the security is valued at the most recently available price or, if the Board of Directors (the Board) so determines, by such other method as the Board shall determine in good faith to reflect its fair market value. Portfolio securities traded on more than one national securities exchange or market are valued according to the broadest and most representative market, as determined by Gabelli Funds, LLC (the Adviser).

Portfolio securities primarily traded on a foreign market are generally valued at the preceding closing values of such securities on the relevant market, but may be fair valued pursuant to procedures established by the Board if market conditions change significantly after the close of the foreign market, but prior to the close of business on the day the securities are being valued. Debt obligations for which market quotations are readily available are valued at the average of the latest bid and asked prices. If there were no asked prices quoted

14

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

on such day, the security is valued using the closing bid price. Such debt obligations are valued through prices provided by a pricing service approved by the Board. Certain securities are valued principally using dealer quotations.

Securities and assets for which market quotations are not readily available are fair valued as determined by the Board. Fair valuation methodologies and procedures may include, but are not limited to: analysis and review of available financial andnon-financial information about the company; comparisons with the valuation and changes in valuation of similar securities, including a comparison of foreign securities with the equivalent U.S. dollar value American Depositary Receipt securities at the close of the U.S. exchange; and evaluation of any other information that could be indicative of the value of the security.

The inputs and valuation techniques used to measure fair value of the Fund’s investments are summarized into three levels as described in the hierarchy below:

● Level 1 — quoted prices in active markets for identical securities;

● Level 2 — other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.); and

● Level 3 — significant unobservable inputs (including the Board’s determinations as to the fair value of investments).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input both individually and in the aggregate that is significant to the fair value measurement. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. The summary of the Fund’s investments in securities by inputs used to value the Fund’s investments as of December 31, 2019 is as follows:

	Valuation Inputs
	Level 1 Quoted Prices		Level 2 Other Significant Observable Inputs		Level 3 Significant Unobservable Inputs		Total Market Value at 12/31/19
INVESTMENTS IN SECURITIES:
ASSETS (Market Value):
Common Stocks
Communication Services		$62,141,777		$    84,711		$409,347		$62,635,835
Consumer Staples		138,671		75		—		138,746
Financials		3,035,003		—		2,520		3,037,523
Other (a)		10,688,928		—		—		10,688,928
Total Common Stocks		76,004,379		84,786		411,867		76,501,032
Closed-End Funds (a)		—		120,350		—		120,350
Warrants (a)		—		517,590		—		517,590
Corporate Bonds (a)		—		—		1,532		1,532
U.S. Government Obligations		—		937,129		—		937,129
TOTAL INVESTMENTS IN SECURITIES – ASSETS		$76,004,379		$1,659,855		$413,399		$78,077,633

(a) Please refer to the Schedule of Investments for the industry classifications of these portfolio holdings.

The Fund did not have any transfers into or out of Level 3 during the year ended December 31, 2019.

15

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

Additional Information to Evaluate Qualitative Information.

General.The Fund uses recognized industry pricing services – approved by the Board and unaffiliated with the Adviser – to value most of its securities, and uses broker quotes provided by market makers of securities not valued by these and other recognized pricing sources. Several different pricing feeds are received to value domestic equity securities, international equity securities, preferred equity securities, and fixed income securities. The data within these feeds are ultimately sourced from major stock exchanges and trading systems where these securities trade. The prices supplied by external sources are checked by obtaining quotations or actual transaction prices from market participants. If a price obtained from the pricing source is deemed unreliable, prices will be sought from another pricing service or from a broker/dealer that trades that security or similar securities.

Fair Valuation.Fair valued securities may be common or preferred equities, warrants, options, rights, or fixed income obligations. Where appropriate, Level 3 securities are those for which market quotations are not available, such as securities not traded for several days, or for which current bids are not available, or which are restricted as to transfer. When fair valuing a security, factors to consider include recent prices of comparable securities that are publicly traded, reliable prices of securities not publicly traded, the use of valuation models, current analyst reports, valuing the income or cash flow of the issuer, or cost if the preceding factors do not apply. A significant change in the unobservable inputs could result in a lower or higher value in Level 3 securities. The circumstances of Level 3 securities are frequently monitored to determine if fair valuation measures continue to apply.

The Adviser reports quarterly to the Board the results of the application of fair valuation policies and procedures. These may include backtesting the prices realized in subsequent trades of these fair valued securities to fair values previously recognized.

Foreign Currency Translations.The books and records of the Fund are maintained in U.S. dollars. Foreign currencies, investments, and other assets and liabilities are translated into U.S. dollars at current exchange rates. Purchases and sales of investment securities, income, and expenses are translated at the exchange rate prevailing on the respective dates of such transactions. Unrealized gains and losses that result from changes in foreign exchange rates and/or changes in market prices of securities have been included in unrealized appreciation/depreciation on investments and foreign currency translations. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of interest and dividends recorded on the books of the Fund and the amounts actually received. The portion of foreign currency gains and losses related to fluctuation in exchange rates between the initial purchase trade date and subsequent sale trade date is included in realized gain/(loss) on investments.

Foreign Securities.The Fund may directly purchase securities of foreign issuers. Investing in securities of foreign issuers involves special risks not typically associated with investing in securities of U.S. issuers. The risks include possible revaluation of currencies, the inability to repatriate funds, less complete financial information about companies, and possible future adverse political and economic developments. Moreover, securities of many foreign issuers and their markets may be less liquid and their prices more volatile than securities of comparable U.S. issuers.

16

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

Foreign Taxes.The Fund may be subject to foreign taxes on income, gains on investments, or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Restricted Securities.The Fund may invest up to 15% of its net assets in securities for which the markets are restricted. Restricted securities include securities whose disposition is subject to substantial legal or contractual restrictions. The sale of restricted securities often requires more time and results in higher brokerage charges or dealer discounts and other selling expenses than does the sale of securities eligible for trading on national securities exchanges or in theover-the-counter markets. Restricted securities may sell at a price lower than similar securities that are not subject to restrictions on resale. Securities freely saleable among qualified institutional investors under special rules adopted by the SEC may be treated as liquid if they satisfy liquidity standards established by the Board. The continued liquidity of such securities is not as well assured as that of publicly traded securities, and accordingly the Board will monitor their liquidity.

Investments in other Investment Companies.The Fund may invest, from time to time, in shares of other investment companies (or entities that would be considered investment companies but are excluded from the definition pursuant to certain exceptions under the 1940 Act) (the Acquired Funds) in accordance with the 1940 Act and related rules. Shareholders in the Fund would bear the pro rata portion on of the periodic expenses of the Acquired Funds in addition to the Fund’s expenses. For the year ended December 31, 2019, the Fund’s pro rata portion of the periodic expenses charged by the Acquired Funds was approximately two basis points.

Securities Transactions and Investment Income.Securities transactions are accounted for on the trade date with realized gain or loss on investments determined by using the identified cost method. Interest income (including amortization of premium and accretion of discount) is recorded on an accrual basis. Premiums and discounts on debt securities are amortized using the effective yield to maturity method. Dividend income is recorded on theex-dividend date, except for certain dividends from foreign securities that are recorded as soon after theex-dividend date as the Fund becomes aware of such dividends.

Determination of Net Asset Value and Calculation of Expenses.Certain administrative expenses are common to, and allocated among, various affiliated funds. Such allocations are made on the basis of each fund’s average net assets or other criteria directly affecting the expenses as determined by the Adviser pursuant to procedures established by the Board.

In calculating the NAV per share of each class, investment income, realized and unrealized gains and losses, redemption fees, and expenses other than class specific expenses are allocated daily to each class of shares based upon the proportion of net assets of each class at the beginning of each day. Distribution expenses are borne solely by the class incurring the expense.

Distributions to Shareholders.Distributions to shareholders are recorded on theex-dividend date. Distributions to shareholders are based on income and capital gains as determined in accordance with federal income tax regulations, which may differ from income and capital gains as determined under GAAP. These differences are primarily due to differing treatments of income and gains on various investment securities and foreign currency transactions, timing differences, and differing characterizations of distributions made by the Fund. Distributions from net investment income for federal income tax purposes include net realized gains on foreign currency transactions. These book/tax differences are either temporary or permanent in nature. To the extent

17

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

these differences are permanent, adjustments are made to the appropriate capital accounts in the period when the differences arise. Permanent differences were primarily due to the tax treatment of currency gains and losses, sales relating to investments considered no longer to be passive foreign investments, capital gain adjustment on sale of real estate investment trusts and redesignation of dividends paid. These reclassifications have no impact on the NAV of the Fund. For the year ended December 31, 2019, reclassifications were made to decreasepaid-in capital by $84,346, with an offsetting adjustment to total distributable earnings.

The tax character of distributions paid during the year ended December 31, 2019 and 2018 were as follows:

	Year Ended December 31, 2019		Year Ended December 31, 2018
Distributions paid from:
Ordinary income (inclusive of short term capital gains)		$1,903,819		$1,045,421
Net long term capital gains		2,950,703		3,372,843
Return of Capital		—		41,453
Total distributions paid		$4,854,522		$4,459,717

Provision for Income Taxes.The Fund intends to continue to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended (the Code). It is the policy of the Fund to comply with the requirements of the Code applicable to regulated investment companies and to distribute substantially all of its net investment company taxable income and net capital gains. Therefore, no provision for federal income taxes is required.

At December 31, 2019, the components of accumulated earnings/losses on a tax basis were as follows:

Undistributed ordinary income	$	19,774
Net unrealized appreciation on investments and foreign currency translations		21,889,979
Total	$	21,909,753

The Fund is permitted to carry capital losses forward for an unlimited period. Capital losses that are carried forward will retain their character as either short term or long term capital losses.

At December 31, 2019, the temporary differences between book basis and tax basis unrealized appreciation were primarily due to deferral of losses from wash sales for tax purposes andmark-to-market adjustments on investments previously considered to be a passive foreign investment company, and no longer considered a passive foreign investment company.

The following summarizes the tax cost of investments and the related net unrealized appreciation at December 31, 2019.

	Cost	Gross Unrealized Appreciation	Gross Unrealized Depreciation	Net Unrealized Appreciation
Investments	$56,187,116	$26,400,369	$(4,509,852)	$21,890,517

The Fund is required to evaluate tax positions taken or expected to be taken in the course of preparing the Fund’s tax returns to determine whether the tax positions are“more-likely-than-not” of being sustained by the applicable tax authority. Income tax and related interest and penalties would be recognized by the Fund as tax expense in the Statement of Operations if the tax positions were deemed not to meet themore-likely-than-not threshold. During the year ended December 31, 2019, the Fund did not incur any income tax, interest, or

18

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

penalties. As of December 31, 2019, the Adviser has reviewed all open tax years and concluded that there was no impact to the Fund’s net assets or results of operations. The Fund’s federal and state tax returns for the prior three fiscal years remain open, subject to examination. On an ongoing basis, the Adviser will monitor the Fund’s tax positions to determine if adjustments to this conclusion are necessary.

3. Investment Advisory Agreement and Other Transactions.The Fund has entered into an investment advisory agreement (the Advisory Agreement) with the Adviser which provides that the Fund will pay the Adviser a fee, computed daily and paid monthly, at the annual rate of 1.00% of the value of its average daily net assets. In accordance with the Advisory Agreement, the Adviser provides a continuous investment program for the Fund’s portfolio, oversees the administration of all aspects of the Fund’s business and affairs, and pays the compensation of all Officers and Directors of the Fund who are affiliated persons of the Adviser.

Through November 30, 2019, the Adviser had agreed to waive and/or to reimburse expenses of the Fund to the extent necessary to maintain the annualized total operating expenses of Class I (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) at no more than an annual rate of 1.00% of the value of that class’s average daily net assets. Effective December 1, 2019, the Adviser amended its contractual agreement with respect to each share class of the Fund to waive its investment advisory fees and/or to reimburse expenses to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) until at least April 30, 2021, at no more than 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. During the year ended December 31, 2019, the Adviser reimbursed expenses in the amount of $91,150. In addition, the Fund has agreed, during the two year period following any waiver or reimbursement by the Adviser, to repay such amount to the extent, that after giving effect to the repayment, such adjusted annualized total operating expenses of the Fund would not exceed 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. The agreement is renewable annually. At December 31, 2019, the cumulative amount which the Fund may repay the Adviser, subject to the terms above, is $161,750:

For the year ended December 31, 2018, expiring December 31, 2020	$	70,600
For the year ended December 31, 2019, expiring December 31, 2021		91,150
	$	161,750

The Corporation pays each Director who is not considered to be an affiliated person an annual retainer of $6,000 plus $1,000 for each Board meeting attended and they are reimbursed for any out of pocket expenses incurred in attending meetings. All Board committee members receive $1,000 per meeting attended. The Chairman of the Audit Committee receives an annual fee of $3,000, and the Lead Director receives an annual fee of $2,000. A Director may receive a single meeting fee, allocated among the participating funds, for attending certain meetings held on behalf of multiple funds. Directors who are directors or employees of the Adviser or an affiliated company receive no compensation or expense reimbursement from the Corporation.

4. Distribution Plan.The Fund’s Board has adopted a distribution plan (the Plan) for each class of shares, except for Class I Shares, pursuant to Rule12b-1 under the 1940 Act. Under the Class AAA, Class A, and Class C Share Plans, payments are authorized to G.distributors, LLC (the Distributor), an affiliate of the Adviser, at annual rates of 0.25%, 0.25%, and 1.00%, respectively, of the average daily net assets of those classes, the annual limitations under each Plan. Such payments are accrued daily and paid monthly.

19

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

5. Portfolio Securities.Purchases and sales of securities during the year ended December 31, 2019, other than short term securities and U.S. Government obligations, aggregated $10,855,164 and $19,507,654, respectively.

6. Transactions with Affiliates and Other Arrangements.During the year ended December 31, 2019, the Fund paid brokerage commissions on security trades of $13,236 to G.research, LLC, an affiliate of the Adviser. Additionally, the Distributor retained a total of $479 from investors representing commissions (sales charges and underwriters fees) on sales and redemptions of Fund shares.

The Fund received credits from a designated broker who agreed to pay certain Fund operating expenses. The amount of such expenses paid through this directed brokerage arrangement during this period was $689.

The cost of calculating the Fund’s NAV per share is a Fund expense pursuant to the Advisory Agreement. Under thesub-administration agreement with Bank of New York Mellon, the fees paid include the cost of calculating the Fund’s NAV. The Fund reimburses the Adviser for this service. During the year ended December 31, 2019, the Fund accrued $45,000 in accounting fees in the Statement of Operations.

7. Line of Credit.The Fund participates in an unsecured line of credit which expires on March 4, 2020 and may be renewed annually, of up to $75,000,000 under which it may borrow up to 10% of its net assets from the custodian for temporary borrowing purposes. Borrowings under this arrangement bear interest at a floating rate equal to the higher of the overnight Federal Funds rate plus 125 basis points or the 30 day ICE LIBOR plus 125 basis points in effect on that day. This amount, if any, would be included in “Interest expense” in the Statement of Operations. At December 31, 2019, there were no borrowings outstanding under the line of credit.

The average daily amount of borrowings outstanding under the line of credit during the year ended December 31, 2019 was $4,786 with a weighted average interest rate of 3.81%. The maximum amount borrowed at anytime during the year ended December 31, 2019 was $387,000.

8. Capital Stock.The Fund offers four classes of shares–Class AAA Shares, Class A Shares, Class C Shares, and Class I Shares. Class AAA and Class I Shares are offered without a sales charge. Class A Shares are subject to a maximumfront-end sales charge of 5.75% and Class C Shares are subject to a 1.00% contingent deferred sales charge for one year after purchase.

The Fund imposes a redemption fee of 2.00% on all classes of shares that are redeemed or exchanged on or before the seventh day after the date of a purchase. The redemption fee is deducted from the proceeds otherwise payable to the redeeming shareholders and is retained by the Fund as an increase inpaid-in capital. The redemption fees retained by the Fund during the year ended December 31, 2019 and 2018, if any, can be found in the Statement of Changes in Net Assets under Redemption Fees.

20

The Gabelli Global Content & Connectivity Fund

Notes to Financial Statements (Continued)

Transactions in shares of capital stock were as follows:

	Year Ended December 31, 2019						Year Ended December 31, 2018
	Shares			Amount			Shares			Amount
Class AAA
Shares sold		18,269		$	359,384			37,061		$	785,310
Shares issued upon reinvestment of distributions		192,809			3,794,424			194,100			3,470,481
Shares redeemed		(395,781	)		(7,882,807	)		(493,849	)		(10,388,069	)
Net decrease		(184,703	)	$	(3,728,999	)		(262,688	)	$	(6,132,278	)
Class A
Shares sold		11,470		$	233,058			2,091		$	43,839
Shares issued upon reinvestment of distributions		879			17,451			485			8,745
Shares redeemed		(6,170	)		(123,082	)		(16,146	)		(347,453	)
Net increase/(decrease)		6,179		$	127,427			(13,570	)	$	(294,869	)
Class C
Shares sold		957		$	18,383			7,249		$	145,473
Shares issued upon reinvestment of distributions		186			3,567			836			14,433
Shares redeemed		(12,687	)		(243,089	)		(4,769	)		(96,473	)
Net increase/(decrease)		(11,544	)	$	(221,139	)		3,316		$	63,433
Class I
Shares sold		18,555		$	366,674			94,989		$	2,058,019
Shares issued upon reinvestment of distributions		40,293			790,553			42,285			753,940
Shares redeemed		(108,204	)		(2,136,348	)		(110,731	)		(2,277,977	)
Net increase/(decrease)		(49,356	)	$	(979,121	)		26,543		$	533,982
Class T *
Shares redeemed		—			—			(48	)	$	(1,038	)
Net decrease		—			—			(48	)	$	(1,038	)

* Class T Shares were liquidated on September 21, 2018.

9. Indemnifications.The Fund enters into contracts that contain a variety of indemnifications. The Fund’s maximum exposure under these arrangements is unknown. However, the Fund has not had prior claims or losses pursuant to these contracts. Management has reviewed the Fund’s existing contracts and expects the risk of loss to be remote.

10. Subsequent Events.Effective January 1, 2020, Mario J. Gabelli, CFA, and Brett Harriss no longer serve as portfolio managers of the Fund. Management has evaluated the impact on the Fund of all other subsequent events occurring through the date the financial statements were issued and has determined that there were no other subsequent events requiring recognition or disclosure in the financial statements.

21

The Gabelli Global Content & Connectivity Fund

Report of Independent Registered Public Accounting Firm

To the Shareholders of The Gabelli Global Content & Connectivity Fund

and the Board of Directors of GAMCO Global Series Funds, Inc.

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of The Gabelli Global Content & Connectivity Fund (the “Fund”) (one of the funds constituting GAMCO Global Series Funds, Inc. (the “Corporation”)), including the schedule of investments, as of December 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund (one of the funds constituting GAMCO Global Series Funds, Inc.) at December 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and its financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Corporation’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Corporation in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Corporation is not required to have, nor were we engaged to perform, an audit of the Corporation’s internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Corporation’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2019, by correspondence with the custodian. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the auditor of one or more Gabelli/GAMCO Funds investment companies since 1992.

Philadelphia, Pennsylvania

February 27, 2020

22

The Gabelli Global Content & Connectivity Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited)

During the six months ended December 31, 2019, the Board of Directors of the Corporation approved the continuation of the investment advisory agreement with the Adviser for the Fund on the basis of the recommendation by the directors (the Independent Board Members) who are not interested persons of the Fund. The following paragraphs summarize the material information and factors considered by the Independent Board Members as well as their conclusions relative to such factors.

Nature, Extent, and Quality of Services.The Independent Board Members considered information regarding the Fund’s portfolio managers, the depth of the analyst pool available to the Adviser and the Fund’s portfolio managers, the scope of supervisory, administrative, shareholder, and other services supervised or provided by the Adviser, and the absence of significant service problems reported to the Board. The Independent Board Members noted the experience, length of service, and reputation of the Fund’s portfolio managers.

Investment Performance.The Independent Board Members reviewed the short, medium, and long term performance of the Fund (as of September 30, 2019) against a peer group of six other comparable funds prepared by the Adviser (the Adviser Peer Group), and against a peer group prepared by Broadridge (the Broadridge Performance Peer Group) consisting of all retail and institutional telecommunication funds, regardless of asset size or primary channel of distribution, as represented by the Lipper Telecom Fund Index. The Independent Board Members noted that the Fund’s performance was in the fourth (lowest) quartile for the one, three, five, and ten year periods, as measured against the Adviser Peer Group. Against the Broadridge Performance Peer Group, the Independent Board Members noted that the Fund’s performance was in the fourth quintile for the one, three, and ten year periods and in the fifth quintile for the five year period. The Independent Board Members also noted that had recently changed its name and investment mandate.

Profitability.The Independent Board Members reviewed summary data regarding the profitability of the Fund to the Adviser both with a pro rata administrative charge and with a standalone administrative charge and noted the impact of the expense limitation agreement. The Independent Board Members also noted that a substantial portion of the Fund’s portfolio transactions were executed by an affiliated broker of the Adviser and that another affiliated broker received distribution fees and minor amounts of sales commissions.

Economies of Scale.The Independent Board Members discussed the major elements of the Adviser’s cost structure, the relationship of those elements to potential economies of scale and reviewed data provided by the Adviser.

Sharing of Economies of Scale.The Independent Board Members noted that the investment management fee schedule for the Fund does not take into account any potential economies of scale that may develop.

Service and Cost Comparisons.The Independent Board Members compared the expense ratios of the investment management fee, other expenses, and total expenses of the Fund with similar expense ratios of the Adviser Peer Group and a peer group of four other telecommunications funds selected by Broadridge (the Broadridge Expense Peer Group), and noted that the Adviser’s management fee includes substantially all administrative services of the Fund as well as investment advisory services of the Adviser. The Independent Board Members noted the effect of the expense limitation agreement in place for the Fund. The Independent Board Members noted that although the Fund’s total expense ratio was the highest in the Adviser Peer Group and the second highest in the Broadridge Expense Peer Group, it did not significantly depart from the median total expense ratio for each of the two peer groups, and that the Fund’s size was generally average within both peer groups. The Independent Board Members also noted that the advisory fee structure was the same as that in effect for

23

The Gabelli Global Content & Connectivity Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited) (Continued)

most of the Gabelli funds. The Independent Board Members were presented with, but did not consider to be material to their decision, various information comparing the advisory fee with the fee for other types of accounts managed by the Adviser.

Conclusions.The Independent Board Members concluded that the Fund enjoyed highly experienced portfolio management services, good ancillary services, but did not have a favorable performance record. The Independent Board Members also concluded that the Fund’s expense ratios and the profitability to the Adviser of managing the Fund were reasonable, and that economies of scale were not a significant factor in their thinking at this time. The Independent Board Members did not view the potential profitability of ancillary services as material to their decision. On the basis of the foregoing and without assigning particular weight to any single conclusion, the Independent Board Members determined to recommend continuation of the investment advisory agreement to the full Board.

Based on a consideration of all these factors in their totality, the Board Members, including all of the Independent Board Members, determined that the Fund’s advisory fee was fair and reasonable with respect to the quality of services provided and in light of the other factors described above that the Board deemed relevant. Accordingly, the Board Members determined to approve the continuation of the Fund’s Advisory Agreement. The Board Members based their decision on evaluations of all these factors as a whole and did not consider any one factor asall-important or controlling.

24

The Gabelli Global Content & Connectivity Fund

Additional Fund Information (Unaudited)

The business and affairs of the Fund are managed under the direction of the Corporation’s Board of Directors. Information pertaining to the Directors and officers of the Fund is set forth below. The Corporation’s Statement of Additional Information includes additional information about the Fund’s Directors and is available without charge, upon request, by calling800-GABELLI(800-422-3554) or by writing to The Gabelli Global Content & Connectivity Fund at One Corporate Center, Rye, NY 10580-1422.

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Number of Funds in Fund Complex Overseen by Director	Principal Occupation(s) During Past Five Years	Other Directorships Held by Director3
INTERESTED DIRECTORS4:
Mario J. Gabelli, CFA Director and Chief Investment Officer Age: 77	Since 1993	33	Chairman, Chief Executive Officer, and Chief Investment Officer– Value Portfolios of GAMCO Investors, Inc. and Chief Investment Officer– Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc.; Director/ Trustee or Chief Investment Officer of other registered investment companies within the Gabelli/GAMCO Fund Complex; Chief Executive Officer of GGCP, Inc.; Executive Chairman of Associated Capital Group, Inc.	Director of Morgan Group Holdings, Inc. (holding company) (2001-2019); Chairman of the Board and Chief Executive Officer of LICT Corp. (multimedia and communication services company); Director of CIBL, Inc. (broadcasting and wireless communications); Director of ICTC Group Inc. (communications) (2013-2018)
John D. Gabelli Director Age: 75	Since 1993	12	Senior Vice President of G.research, LLC	—
INDEPENDENT DIRECTORS5:
E. Val Cerutti Director Age: 80	Since 2001	7	Chief Executive Officer of Cerutti Consultants, Inc.	Director of The LGL Group, Inc. (diversified manufacturing) (1990-2009)
Anthony J. Colavita6 Director Age: 84	Since 1993	20	President of the law firm of Anthony J. Colavita, P.C.	—
Werner J. Roeder Director Age: 79	Since 1993	21	Retired physician; Former Vice President of Medical Affairs (Medical Director) of New York Presbyterian/Lawrence Hospital (1999-2014)	—
Anthonie C. van Ekris6 Director Age: 85	Since 1993	23	Chairman and Chief Executive Officer of BALMAC International, Inc. (global import/ export company)	—
Salvatore J. Zizza7 Director Age: 74	Since 2004	31	President of Zizza & Associates Corp. (private holding company); President of Bergen Cove Realty Inc.; Chairman of Harbor Diversified, Inc. (pharmaceuticals) (2009-2018); Chairman of BAM (semiconductor and aerospace manufacturing)(2000-2018); Chairman of Metropolitan Paper Recycling Inc. (recycling) (2005-2014)	Director and Chairman of Trans- Lux Corporation (business services); Director and Chairman of Harbor Diversified Inc. (pharmaceuticals) (2009-2018)

25

The Gabelli Global Content & Connectivity Fund

Additional Fund Information (Continued) (Unaudited)

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Principal Occupation(s) During Past Five Years
OFFICERS:
Bruce N. Alpert President Age: 68	Since 1993	Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC since 1988; Officer of registered investment companies within the Gabelli/GAMCO Fund Complex; Senior Vice President of GAMCO Investors, Inc. since 2008
John C. Ball Treasurer Age: 43	Since 2017	Treasurer of funds within the Gabelli/GAMCO Fund Complex since 2017; Vice President and Assistant Treasurer of AMG Funds, 2014-2017; Vice President of State Street Corporation, 2007-2014
Agnes Mullady Vice President Age: 61	Since 2006	Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2006; President and Chief Operating Officer of the Fund Division of Gabelli Funds, LLC since 2015; Chief Executive Officer of G.distributors, LLC since 2010; Senior Vice President of GAMCO Investors, Inc. since 2009; Vice President of Gabelli Funds, LLC since 2007; Executive Vice President of Associated Capital Group, Inc. since 2016
Andrea R. Mango Secretary Age: 47	Since 2013	Vice President of GAMCO Investors, Inc. since 2016; Counsel of Gabelli Funds, LLC since 2013; Secretary of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013; Vice President ofclosed-end funds within the Gabelli/GAMCO Fund Complex since 2014
Richard J. Walz Chief Compliance Officer Age: 60	Since 2013	Chief Compliance Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013

¹  Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.

²  Each Director will hold office for an indefinite term until the earliest of (i) the next meeting of shareholders, if any, called for the purpose of considering the election orre-election of such Director and until the election and qualification of his or her successor, if any, elected at such meeting, or (ii) the date a Director resigns or retires, or a Director is removed by the Board of Directors or shareholders, in accordance with the Corporation’sBy-Laws and Articles of Incorporation. For officers, includes time served in prior officer positions with the Fund. Each officer will hold office for an indefinite term until the date he or she resigns or retires or until his or her successor is elected and qualified.

³  This column includes only directorships of companies required to report to the SEC under the Securities Exchange Act of 1934, as amended, i.e., public companies, or other investment companies registered under the 1940 Act.

⁴  “Interested person” of the Corporation as defined in the 1940 Act. Messrs. Mario J. Gabelli and John D. Gabelli, who are brothers, are each considered an “interested person” because of their affiliation with Gabelli Funds, LLC which acts as the Corporation’s investment adviser.

⁵  Directors who are not interested persons are considered “Independent” Directors.

⁶  Mr. Colavita’s son, Anthony S. Colavita, serves as a director of other funds in the Gabelli/GAMCO Fund Complex. Mr. van Ekris is an independent director of Gabelli International Ltd., Gabelli Fund LDC, GAMA Capital Opportunities Master Ltd., and GAMCO International SICAV, which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and, in that event, would be deemed to be under common control with the Fund’s Adviser.

⁷  Mr. Zizza is an independent director of Gabelli International Ltd., which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and in that event would be deemed to be under common control with the Fund’s Adviser. On September 9, 2015, Mr. Zizza entered into a settlement with the SEC to resolve an inquiry relating to an alleged violation regarding the making of false statements or omissions to the accountants of a company concerning a related party transaction. The company in question is not an affiliate of, nor has any connection to, the Fund. Under the terms of the settlement, Mr. Zizza, without admitting or denying the SEC’s findings and allegation, paid $150,000 and agreed to cease and desist committing or causing any future violations of Rule13b2-2 of the Securities Exchange Act of 1934, as amended. The Board has discussed this matter and has determined that it does not disqualify Mr. Zizza from serving as an Independent Director.

26

Gabelli/GAMCO Funds and Your Personal Privacy

Who are we?

The Gabelli/GAMCO Funds are investment companies registered with the Securities and Exchange Commission under the Investment Company Act of 1940. We are managed by Gabelli Funds, LLC, which is affiliated with GAMCO Investors, Inc., a publicly held company with subsidiaries and affiliates that provide investment advisory services for a variety of clients.

What kind ofnon-public information do we collect about you if you become a fund shareholder?

If you apply to open an account directly with us, you will be giving us somenon-public information about yourself. Thenon-public information we collect about you is:

● Information you give us on your application form. This could include your name, address, telephone number, social security number, bank account number, and other information.

● Information about your transactions with us, any transactions with our affiliates, and transactions with the entities we hire to provide services to you. This would include information about the shares that you buy or redeem. If we hire someone else to provide services — like a transfer agent — we will also have information about the transactions that you conduct through them.

What information do we disclose and to whom do we disclose it?

We do not disclose anynon-public personal information about our customers or former customers to anyone other than our affiliates, our service providers who need to know such information, and as otherwise permitted by law. If you want to find out what the law permits, you can read the privacy rules adopted by the Securities and Exchange Commission. They are in volume 17 of the Code of Federal Regulations, Part 248. The Commission often posts information about its regulations on its website, www.sec.gov.

What do we do to protect your personal information?

We restrict access tonon-public personal information about you to the people who need to know that information in order to provide services to you or the fund and to ensure that we are complying with the laws governing the securities business. We maintain physical, electronic, and procedural safeguards to keep your personal information confidential.

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THE GABELLI GLOBAL CONTENT & CONNECTIVITY FUND

One Corporate Center

Rye, NY 10580-1422

Portfolio Management Team Biographies

Mario J. Gabelli, CFA,is Chairman, Chief Executive Officer, and Chief Investment Officer - Value Portfolios of GAMCO Investors, Inc. that he founded in 1977, and Chief Investment Officer - Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc. He is also Executive Chairman of Associated Capital Group, Inc. Mr. Gabelli is a summa cum laude graduate of Fordham University and holds an MBA degree from Columbia Business School and Honorary Doctorates from Fordham University and Roger Williams University.

Evan D. Miller, CFA,joined G.research, LLC in 2002 as a research analyst following the telecommunications industry on a global basis. Currently, he continues to specialize in the industry and also serves as a portfolio manager of Gabelli Funds, LLC and the Fund. Prior to joining Gabelli, his career spanned nearly a quarter century in the telecommunications industry with corporate strategy and business development positions. Mr. Miller holds an MBA in Finance from the University of Chicago and a BA in Economics from Northwestern University.

Sergey Dluzhevskiy, CFA, CPA,joined G.research, LLC in 2005 as a research analyst covering the North American telecommunications industry. Currently, he continues to specialize in the industry and also serves as a portfolio manager of Gabelli Funds, LLC and the Fund. Prior to joining Gabelli, Mr. Dluzhevskiy was a senior accountant at Deloitte. He received his undergraduate degree from Case Western Reserve University and an MBA at the Wharton School of the University of Pennsylvania.

Brett Harrissjoined G. Research as a research analyst in 2008 covering Media and Entertainment. Currently, he oversees the digital research team responsible for covering the Telecommunication, Media, Technology, and Gaming & Lodging industries, and also serves as a portfolio manager of Gabelli Funds, LLC and the Fund. Previously, he worked as a financial analyst at JetBlue and as an investment banker at JPMorgan Chase. Mr. Harris received his BA from Columbia University in Economics and his MBA from Columbia Business School in Finance and Economics.

We have separated the portfolio managers’ commentary from the financial statements and investment portfolio due to corporate governance regulations stipulated by the Sarbanes-Oxley Act of 2002. We have done this to ensure that the content of the portfolio managers’ commentary is unrestricted. Both the commentary and the financial statements, including the portfolio of investments, will be available on our website at www.gabelli.com.

2019 TAX NOTICE TO SHAREHOLDERS(Unaudited)

For the year ended December 31, 2019, the Fund paid to shareholders ordinary income distributions (comprised of net investment income and short term capital gains) totaling $0.4826, $0.4904, $0.1217, and $0.6297, per share for Class AAA, Class A, Class C, and Class I Shares, respectively, and long term capital gains totaling $2,950,703, or the maximum allowable. The distribution of long term capital gains has been designated as a capital gain dividend by the Fund’s Board of Directors. For the year ended December 31, 2019, 27.75% of the ordinary income distribution qualifies for the dividends received deduction available to corporations. The Fund designates 75.25% of the ordinary income distribution as qualified dividend income pursuant to the Jobs and Growth Tax Relief Reconciliation Act of 2003. The Fund designates 0.93% of the ordinary income distribution as qualified interest income pursuant to the Tax Relief, Unemployment Reauthorization, and Job Creation Act of 2010. Also for the year of 2019, the Fund did not have foreign tax credits.

U.S. Government Income:

The percentage of the ordinary income distribution paid by the Fund during the year ended December 31, 2019 which was derived from U.S. Treasury securities was 0.60%. Such income is exempt from state and local tax in all states. However, many states, including New York and California, allow a tax exemption for a portion of the income earned only if a mutual fund has invested at least 50% of its assets at the end of each quarter of the Fund’s fiscal year in U.S. Government securities. The Fund did not meet this strict requirement in 2019. The percentage of U.S. Government securities held as of December 31, 2019 was 1.20%. Due to the diversity in state and local tax law, it is recommended that you consult your personal tax adviser as to the applicability of the information provided to your specific situation.

GAMCO Global Series Funds, Inc.

THE GABELLI GLOBAL CONTENT & CONNECTIVITY FUND

One Corporate Center

Rye, New York 10580-1422

t 800-GABELLI(800-422-3554)

f 914-921-5118

e info@gabelli.com

GABELLI.COM

Net Asset Value per share available daily

by calling800-GABELLI after 7:00 P.M.

BOARD OF DIRECTORS   Mario J. Gabelli, CFA Chairman and Chief Executive Officer, GAMCO Investors, Inc. Executive Chairman, Associated Capital Group, Inc.   E. Val Cerutti Chief Executive Officer, Cerutti Consultants, Inc.   Anthony J. Colavita President, Anthony J. Colavita, P.C.   John D. Gabelli Senior Vice President, G.research, LLC   Werner J. Roeder Former Medical Director, Lawrence Hospital   Anthonie C. van Ekris Chairman, BALMAC International, Inc.   Salvatore J. Zizza Chairman, Zizza & Associates Corp.   OFFICERS Bruce N. Alpert President   John C. Ball Treasurer   Agnes Mullady Vice President   Andrea R. Mango Secretary   Richard J. Walz Chief Compliance Officer   DISTRIBUTOR G.distributors, LLC   CUSTODIAN State Street Bank and Trust Company   TRANSFER AGENT AND DIVIDEND DISBURSING AGENT DST Asset Manager Solutions, Inc.   LEGAL COUNSEL Skadden, Arps, Slate, Meagher & Flom LLP

This report is submitted for the general information of the shareholders of The Gabelli Global Content & Connectivity Fund. It is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.

GAB401Q419AR

The Gabelli Global Growth Fund

Annual Report — December 31, 2019

(Y)our Portfolio Management Team

Caesar M. P. Bryan Portfolio Manager	Howard F. Ward, CFA Portfolio Manager	Christopher D. Ward, CFA Associate Portfolio Manager

To Our Shareholders,

For the year ended December 31, 2019, the net asset value (NAV) per Class I Share of The Gabelli Global Growth Fund (formerly The GAMCO Global Growth Fund) increased 31.0% compared with an increase of 26.6% for the Morgan Stanley Capital International (MSCI) All Country (AC) World Index. Other classes of shares are available. See page 4 for performance information for all classes.

Enclosed are the financial statements, including the schedule of investments, as of December 31, 2019.

Performance Discussion (Unaudited)

The Fund’s investment objective is to provide investors with appreciation of capital. Current income is a secondary objective of the Fund.

The Fund’s investment strategy is to invest at least 65% of its total assets in common stocks of companies, which the portfolio managers believe are likely to have rapid growth in revenues and earnings and potential for above average capital appreciation or are undervalued. The Global Growth Fund invests primarily in common stocks of foreign and domestic small-capitalization,mid-capitalization, and large-capitalization issuers. As a “global” fund, the Fund invests in securities of issuers, or related investments thereof, located in at least three countries, and at least 40% of the Fund’s total net assets is invested in securities ofnon-U.S. issuers.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (www.gabelli.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. To elect to receive all future reports on paper free of charge, please contact your financial intermediary, or, if you invest directly with the Fund, you may call800-422-3554 or send an email request to info@gabelli.com.

The S&P 500 returned 13.7% through the first quarter, the best first quarter since 1998. Just weeks after suggesting the Fed balance sheet runoff was on “autopilot”, and hiking rates for the ninth time this cycle, the Fed went out of its way to soothe markets. Fed chairman Jerome Powell clarified his intentions, to be patient and flexible with the balance sheet. Fed dot projections became considerably more dovish, with rate hike projections for 2019 decreasing from two to zero in just three months. This Fed pivot resulted in a brief cyclical surge, led by industrials and energy, as the10-year yield rose from 2.55% to 2.78%. February and March proved cyclical leadership to be quite temporary, as market leadership swiftly returned to more defensive areas such as technology, utilities, consumer staples, and REITs, consistent with a falling10-year yield from 2.78% to 2.40%. Domestic and Global PMIs continued to decline, consistent with S&P 500 earnings estimates which were steadily revised lower, from $172 in December to $166 at the end of the first quarter.

Global Purchasing Manager Indices (PMIs) continued to deteriorate in the second quarter reflecting a slowing economy. With leading economic indicators declining and China trade tensions escalating, CEO confidence (as measured by Chief Executive Magazine) declined. However, the market interpreted “bad news” as “good news” as the likelihood of a Fed rate cut increased. As a result, the “Fed relief rally” continued through the second quarter with the market returning 4.3%, fueled by multiple expansion.

For those anticipating more rate cuts, the Fed delivered in the third quarter with not one, but two, 25 basis point cuts. Fed Chairman Powell highlighted low unemployment and strong consumer spending, but acknowledged weakening capex, softer exports, muted inflation and geopolitical risks were sufficient cause for action. Indeed, the third quarter was rife with geopolitical turmoil. On August 1, the market reacted swiftly and violently to the escalating trade tensions between the U.S. and China. President Trump announced an expansion of tariffs to cover nearly 100% of Chinese exports. China responded, in an attempt to offset the tariff impact, by allowing the yuan to depreciate below the critical7-to-1 U.S. dollar threshold. Markets panicked, fearing a currency war, which would have triggered a devastating ripple effect through the global economy. The S&P 500 lost over 6% as the debacle unfolded. The remainder of the third quarter was no less dramatic. Half of Saudi Arabia’s oil production was taken offline bylow-altitude missiles and drones, likely initiated by Iran, testing the United States’ commitment to defend theoil-rich monarchies of the Persian Gulf. Hong Kong demonstrations intensified, leading up to China’s 70th anniversary celebrations in October. Brexit negotiations remained contentious and unresolved as the October 31 deadline approached. And on the domestic front, House Majority Speaker Nancy Pelosi announced the start of a formal impeachment inquiry into President Trump. Despite a decelerating economy and rising geopolitical risks, which drove the10-year yield from 2.05% to 1.67% in the quarter, the S&P 500 finished the quarter just 1.5% below itsall-time high.

The S&P 500 finished the year strong with a 9.1% return in the fourth quarter. September PMIs (released in October) showed improvement, which some interpreted as a PMI trough, fueling a rally in cyclical stocks. Indeed, early cyclical industries, such as housing, had benefitted from the decline in rates over the previous fourteen months. Consumer health metrics remained strong, supported by record low unemployment, record high net worth, and record low debt service. Consumer confidence remained stable at an elevated level. Average hourly earnings grew 3%, a healthy level and well below the recession-inducing threshold of 4%. Oil prices remained consumer friendly. As a result, inflation remained tame, below the Fed’s symmetric 2% target. In contrast, business investment, exports and manufacturing remained weak. Unlike consumer confidence, CEO confidence continued to decline reflecting uncertainty surrounding geopolitics and the election.

2

SUMMARY

Multiple expansion did the heavy lifting in 2019, with earnings contributing less than 2% of the S&P 500’s 31% total return. In fact, 85% of the S&P 500 experienced multiple expansion. Multiple expansion is typically associated with receding market risks. Indeed, investor sentiment improved throughout the year driven by a number of catalysts, including the Fed pivot in January, improving economic data in September, the expected passing of the USMCA trade deal, and an eleventh hour Phase 1 trade agreement with China in December. In addition, investor sentiment, a contrarian indicator rose from bearish in December of 2018 to bullish twelve months later. In the fourth quarter, as a result of improving investor sentiment, corporate credit spreads and high yield credit default swap spreads sat at historic lows, suggesting very little risk was priced into the market. Given elevated P/E multiples and an already low amount of risk priced into the market, it became difficult to envision risks receding any further to fuel continued multiple expansion. For these reasons, we maintained a relatively defensive posture throughout 2019 by limiting beta exposure and selling positions whose valuations became unjustifiable. We believed this to be prudent given leading economic indicators (PMIs) in contraction territory (under 50) and valuations for certain growth stocks returning to peak levels.

Selected holdings that contributed positively to performance in 2019 were: Microsoft Corp. (6.0% of net assets as of December 31, 2019), the world’s largest software company which develops software products for computing devices ranging from PCs to servers to its Xbox game console. The transition from Office to cloud-based Office 365 is resulting in growth in users, average revenue per user, and recurring revenue; IHS Markit Ltd. (3.1%) is a world leader in critical information, analytics and solutions for major industries that drive economies worldwide. Following the merger with Markit in 2016, the combined company also provides financial services clients solutions around securities pricing, reference data, indices, valuation and trading services, trade processing, enterprise software and managed services.; and AON plc. (3.1%) is a leading global professional services firm that provides advice and solutions to clients focused on risk, retirement and health. The company’s revenue mix is transitioning to higher margin, less capital intensive businesses which we believe will result in strong free cash flow generation.

Some of our weaker performing holdings during the year were: Jardine Matheson Holdings Ltd. (1.4%), whose businesses range from automobile and hotels to supermarkets all around Asia. The conglomerate’s volatility was an embodiment of intensifying global trade tensions, prolonged protest in Hong Kong and slowing auto sales; New Relic Inc. (no longer held as of December 31, 2019), an American software analytics company that had a negative return on equity and negative net margin; and Verizon Communications Inc. (no longer held), an American multinational telecommunications conglomerate, has a high level of debt and large one off items that impacted financial results.

Thank you for your investment in The Gabelli Global Growth Fund.

We appreciate your confidence and trust.

3

Comparative Results

Average Annual Returns through December 31, 2019 (a) (Unaudited)													Since Inception (2/7/94)
	1 Year			5 Year			10 Year			15 Year
Class I (GGGIX)		31.03	%		10.99	%		11.43	%		8.85	%		9.53	%
Class AAA (GICPX)		30.73			10.39			10.96			8.50			9.33
MSCI AC World Index		26.60			8.41			8.79			6.86			7.06	(b)
Lipper GlobalLarge-Cap Growth Fund Classification		30.32			10.19			10.18			8.05			7.75
Class A (GGGAX)		30.74			10.39			10.97			8.50			9.34
With sales charge (c)		23.22			9.09			10.31			8.07			9.09
Class C (GGGCX)		29.82			9.58			10.15			7.69			8.71
With contingent deferred sales charge (d)		28.82			9.58			10.15			7.69			8.71

In the current prospectuses dated April 30, 2019, as amended by the supplement dated December 3, 2019, the gross expense ratios for Class AAA, A, C, and I Shares are 1.68%, 1.68%, 2.43%, and 1.43%, respectively, and the net expense ratio for all share classes after contractual reimbursements by Gabelli Funds, LLC, (the “Adviser”) is 0.90%. See page 11 for the expense ratios for the year ended December 31, 2019. The contractual reimbursements are in effect through April 30, 2021. Class AAA and Class I Shares do not have a sales charge. The maximum sales charge for Class A Shares and Class C Shares is 5.75% and 1.00%, respectively.

(a) Returns represent past performance and do not guarantee future results. Total returns and average annual returns reflect changes in share price, reinvestment of distributions, and are netof expenses. Investment returns and the principal value of an investment will fluctuate. When shares are redeemed, they may be worth more or less than their original cost. Currentperformance may be lower or higher than the performance data presented. Visit www.gabelli.com for performance information as of the most recent month end. Returns would have beenlower had the Adviser not reimbursed certain expenses. The Fund imposes a 2% redemption fee on shares sold or exchanged within seven days after the date of purchase. Investors shouldcarefully consider the investment objectives, risks, charges, and expenses of the Fund before investing. The prospectuses contain information about these and other matters and should beread carefully before investing. To obtain a prospectus, please visit our website at www.gabelli.com. Investing in foreign securities involves risks not ordinarily associated with investments in domestic issues, including currency fluctuation, economic, and political risks. The Class AAA Share NAVs are used to calculate performance for the periods prior to the issuance of Class A Shares, Class C Shares, and Class I Shares on March 2, 2000, March 12, 2000, and January 11, 2008, respectively. The actual performance of the Class A and Class C Shares would have been lower due to the additional fees and expenses associated with these classes of shares. The actual performance of Class I Shares would have been higher due to lower expenses related to this class of shares. The MSCI AC World Index is an unmanaged market capitalization weighted index that is designed to measure the equity market performance of developed and emerging markets. The MSCI AC World Index consists of 45 country indices comprising 24 developed and 21 emerging market country indices. The Lipper GlobalLarge-Cap Growth Fund Classification reflects the performance of mutual funds classified in this particular category. Dividends are considered reinvested. You cannot invest directly in an index.

(b) The MSCI AC World Index since inception performance is as of January 31, 1994.

(c) Performance results include the effect of the maximum 5.75% sales charge at the beginning of the period.

(d) Assuming payment of the 1% maximum contingent deferred sales charge imposed on redemptions made within one year of purchase.

COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN

THE GABELLI GLOBAL GROWTH FUND (CLASS AAA SHARES), MSCI AC WORLD INDEX, AND

LIPPER GLOBALLARGE-CAP GROWTH FUND CLASSIFICATION (Unaudited)

* Past performance is not predictive of future results. The performance tables and graph do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares.

4

The Gabelli Global Growth Fund

Disclosure of Fund Expenses (Unaudited)

For the Six Month Period from July 1, 2019 through December 31, 2019                         Expense Table

We believe it is important for you to understand the impact of fees and expenses regarding your investment. All mutual funds have operating expenses. As a shareholder of a fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund’s gross income, directly reduce the investment return of a fund. When a fund’s expenses are expressed as a percentage of its average net assets, this figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your Fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The Expense Table below illustrates your Fund’s costs in two ways:

Actual Fund Return:This section provides information about actual account values and actual expenses. You may use this section to help you to estimate the actual expenses that you paid over the period after any fee waivers and expense reimbursements. The “Ending Account Value” shown is derived from the Fund’sactualreturn during the past six months, and the “Expenses Paid During Period” shows the dollar amount that would have been paid by an investor who started with $1,000 in the Fund. You may use this information, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your Fund under the heading “Expenses Paid During Period” to estimate the expenses you paid during this period.

Hypothetical 5% Return:This section provides information about hypothetical account values and

hypothetical expenses based on the Fund’s actual expense ratio. It assumes a hypothetical annualized return of 5% before expenses during the period shown. In this case – because the hypothetical return used isnotthe Fund’s actual return – the results do not apply to your investment and you cannot use the hypothetical account value and expense to estimate the actual ending account balance or expenses you paid for the period. This example is useful in making comparisons of the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs such as sales charges (loads), redemption fees, or exchange fees, if any, which are described in the Prospectus. If these costs were applied to your account, your costs would be higher. Therefore, the 5% hypothetical return is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. The “Annualized Expense Ratio” represents the actual expenses for the last six months and may be different from the expense ratio in the Financial Highlights which is for the year ended December 31, 2019.

	Beginning Account Value 07/01/19		Ending Account Value 12/31/19		Annualized Expense Ratio			Expenses Paid During Period*
The Gabelli Global Growth Fund
Actual Fund Return
Class AAA		$1,000.00		$1,071.40		1.19	%		$6.21
Class A		$1,000.00		$1,071.70		1.19	%		$6.21
Class C		$1,000.00		$1,068.30		1.77	%		$9.23
Class I		$1,000.00		$1,072.60		0.98	%		$5.12
Hypothetical 5% Return
Class AAA		$1,000.00		$1,019.21		1.19	%		$6.06
Class A		$1,000.00		$1,019.21		1.19	%		$6.06
Class C		$1,000.00		$1,016.28		1.77	%		$9.00
Class I		$1,000.00		$1,020.27		0.98	%		$4.99

* Expenses are equal to the Fund’s annualized expense ratio for the last six months multiplied by the average account value over the period, multiplied by the number of days in the most recent fiscal half year (184 days), then divided by 365.

5

Summary of Portfolio Holdings (Unaudited)

The following table presents portfolio holdings as a percent of net assets as of December 31, 2019:

The Gabelli Global Growth Fund
Information Technology	25.5	%
Consumer Discretionary	19.3	%
Health Care	13.7	%
Consumer Staples	11.1	%
Communication Services	7.4	%
Financials	7.1	%
Industrials	5.8	%

Real Estate	5.1	%
Utilities	4.7	%
U.S. Government Obligations	0.4	%
Other Assets and Liabilities (Net)	(0.1	)%
	100.0	%

The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission (the SEC) for the first and third quarters of each fiscal year on FormN-PORT. Shareholders may obtain this information at www.gabelli.com or by calling the Fund at800-GABELLI(800-422-3554). The Fund’s FormN-PORT is available on the SEC’s website at www.sec.gov and may also be reviewed and copied at the SEC’s Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling800-SEC-0330.

Proxy Voting

The Fund files FormN-PX with its complete proxy voting record for the twelve months ended June 30, no later than August 31 of each year. A description of the Fund’s proxy voting policies, procedures, and how the Fund voted proxies relating to portfolio securities is available without charge, upon request, by (i) calling800-GABELLI(800-422-3554); (ii) writing to The Gabelli Funds at One Corporate Center, Rye, NY 10580-1422; or (iii) visiting the SEC’s website at www.sec.gov.

6

The Gabelli Global Growth Fund

Schedule of Investments — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS — 99.7%
		INFORMATION TECHNOLOGY — 25.5%
	5,400	Adobe Inc.†	$	799,715	$	1,780,974
	2,680	Adyen NV†		1,775,779		2,197,510
	9,910	Apple Inc.		969,141		2,910,071
	6,000	Applied Materials Inc.		333,397		366,240
	7,000	Atlassian Corp. plc, Cl. A†		724,536		842,380
	10,900	Fidelity National Information Services Inc.		1,449,971		1,516,081
	12,900	Fiserv Inc.†		816,334		1,491,627
	8,200	Keyence Corp.		343,743		2,904,772
	6,700	Mastercard Inc., Cl. A		93,730		2,000,553
	43,000	Microsoft Corp.		1,888,936		6,781,100
	4,300	NVIDIA Corp.		846,929		1,011,790
	9,800	PayPal Holdings Inc.†		647,003		1,060,066
	2,600	ServiceNow Inc.†		431,203		734,032
	17,000	Visa Inc., Cl. A		301,339		3,194,300
		TOTAL INFORMATION TECHNOLOGY		11,421,756		28,791,496
		CONSUMER DISCRETIONARY — 19.3%
	6,700	adidas AG		1,745,435		2,177,970
	16,455	Alibaba Group Holding Ltd., ADR†		3,096,223		3,490,105
	1,910	Amazon.com Inc.†		1,776,115		3,529,374
	2,000	Christian Dior SE		290,698		1,024,790
	2,020	Kering SA		1,094,445		1,325,972
	12,800	Lululemon Athletica Inc.†		1,704,237		2,965,376
	4,400	LVMH Moet Hennessy Louis Vuitton SE		738,860		2,044,285
	10,300	McDonald’s Corp.		1,965,389		2,035,383
	41,000	Puma SE		2,488,061		3,143,410
		TOTAL CONSUMER DISCRETIONARY		14,899,463		21,736,665
		HEALTH CARE — 13.7%
	46,900	Bristol-Myers Squibb Co.		2,560,790		3,010,511
	7,900	Danaher Corp.		694,381		1,212,492
	8,400	Edwards Lifesciences Corp.†		1,142,342		1,959,636
	9,600	Merck & Co. Inc.		821,149		873,120
	8,150	Thermo Fisher Scientific Inc.		1,629,374		2,647,691
	10,200	UnitedHealth Group Inc.		2,494,606		2,998,596
	20,600	Zoetis Inc.		1,148,479		2,726,410
		TOTAL HEALTH CARE		10,491,121		15,428,456
		CONSUMER STAPLES — 11.1%
	4,300	Costco Wholesale Corp.		674,475		1,263,856
	244,000	Davide Campari-Milano SpA		1,587,841		2,227,886
	11,200	L’Oreal SA		2,058,684		3,316,657
	34,900	Nestlé SA		2,853,879		3,778,489
	7,756	Pernod Ricard SA		917,464		1,386,771
	2,600	The Estee Lauder Companies Inc., Cl. A		450,236		537,004
		TOTAL CONSUMER STAPLES		8,542,579		12,510,663

Shares			Cost		Market Value
		COMMUNICATION SERVICES — 7.4%
	810	Alphabet Inc., Cl. A†	$	238,018	$	1,084,906
	1,116	Alphabet Inc., Cl. C†		955,699		1,492,114
	13,800	Facebook Inc., Cl. A†		2,568,615		2,832,450
	3,700	IAC/InterActiveCorp.†		561,808		921,707
	1,700	Netflix Inc.†		455,175		550,069
	13,200	Tencent Holdings Ltd		552,615		636,259
	5,900	The Walt Disney Co.		779,629		853,317
		TOTAL COMMUNICATION SERVICES		6,111,559		8,370,822
		FINANCIALS — 7.1%
	103,000	AIA Group Ltd.		1,060,563		1,081,247
	16,900	Aon plc		2,879,540		3,520,101
	31,200	HDFC Bank Ltd., ADR		1,565,157		1,977,144
	27,000	Investor AB, Cl. B		1,270,691		1,473,616
		TOTAL FINANCIALS		6,775,951		8,052,108
		INDUSTRIALS — 5.8%
	45,800	IHS Markit Ltd.†		2,482,225		3,451,030
	27,500	Jardine Matheson Holdings Ltd.		1,334,238		1,529,000
	10,200	United Technologies Corp.		1,515,567		1,527,552
		TOTAL INDUSTRIALS		5,332,030		6,507,582
		REAL ESTATE — 5.1%
	12,700	American Tower Corp., REIT		2,027,077		2,918,714
	20,000	Crown Castle International Corp., REIT		2,343,963		2,843,000
		TOTAL REAL ESTATE		4,371,040		5,761,714
		UTILITIES — 4.7%
	18,000	American Water Works Co. Inc		1,737,343		2,211,300
	12,600	NextEra Energy Inc.		2,285,069		3,051,216
		TOTAL UTILITIES		4,022,412		5,262,516
		TOTAL COMMON STOCKS		71,967,911		112,422,022
Principal Amount
		U.S. GOVERNMENT OBLIGATIONS — 0.4%
	$ 423,000	U.S. Treasury Bills, 1.487% to 1.557%††, 02/20/20 to 03/26/20		421,628		421,633
		TOTAL INVESTMENTS —100.1%	$	72,389,539		112,843,655
		Other Assets and Liabilities (Net) — (0.1)%				(60,452	)
		NET ASSETS — 100.0%.			$	112,783,203

† Non-income producing security.

†† Represents annualized yields at dates of purchase.

See accompanying notes to financial statements.

7

The Gabelli Global Growth Fund

Schedule of Investments (Continued) — December 31, 2019

ADR American Depositary Receipt

REIT Real Estate Investment Trust

Geographic Diversification	% of Market Value			Market Value
United States		58.8	%	$	66,348,886
Europe		27.5			31,068,486
Asia/Pacific		8.5			9,556,135
Canada		2.6			2,965,376
Japan		2.6			2,904,772
		100.0	%	$	112,843,655

See accompanying notes to financial statements.

8

The Gabelli Global Growth Fund

Statement of Assets and Liabilities

December 31, 2019

Assets:
Investments, at value (cost $72,389,539)	$	112,843,655
Cash		1,771
Receivable for Fund shares sold		82,466
Receivable from Adviser		56,534
Dividends receivable		96,092
Prepaid expenses		35,256
Total Assets		113,115,774
Liabilities:
Payable for Fund shares redeemed		91,379
Payable for investment advisory fees		94,449
Payable for distribution fees		21,675
Payable for accounting fees		11,250
Payable for legal and audit fees		44,234
Payable for shareholder communications expenses		32,228
Payable for shareholder services fees		18,712
Other accrued expenses		18,644
Total Liabilities		332,571
Net Assets(applicable to 3,176,099 shares outstanding)	$	112,783,203
Net Assets Consist of:
Paid-in capital	$	72,427,753
Total distributable earnings		40,355,450
Net Assets	$	112,783,203

Shares of Capital Stock, each at $0.001 par value:
Class AAA:
Net Asset Value, offering, and redemption price per share ($88,286,783 ÷ 2,482,411 shares outstanding; 75,000,000 shares authorized)	$	35.56
Class A:
Net Asset Value and redemption price per share ($5,332,055 ÷ 149,981 shares outstanding; 50,000,000 shares authorized)	$	35.55
Maximum offering price per share (NAV ÷ 0.9425, based on maximum sales charge of 5.75% of the offering price)	$	37.72
Class C:
Net Asset Value and offering price per share ($2,598,655 ÷ 89,262 shares outstanding; 25,000,000 shares authorized)	$	29.11	(a)
Class I:
Net Asset Value, offering, and redemption price per share ($16,565,710 ÷ 454,445 shares outstanding; 25,000,000 shares authorized)	$	36.45

(a) Redemption price varies based on the length of time held.

Statement of Operations

For the Year Ended December 31, 2019

Investment Income:
Dividends (net of foreign withholding taxes of $75,768)	$	999,261
Interest		34,631
Total Investment Income		1,033,892
Expenses:
Investment advisory fees		1,023,156
Distribution fees - Class AAA		206,734
Distribution fees - Class A		12,460
Distribution fees - Class C		17,637
Shareholder services fees		84,061
Shareholder communications expenses		67,049
Registration expenses		52,056
Legal and audit fees		51,002
Accounting fees		45,000
Directors’ fees		25,545
Custodian fees		22,421
Interest expense		2,478
Miscellaneous expenses		34,388
Total Expenses		1,643,987
Less:
Expense reimbursements (See Note 3)		(412,641	)
Net Expenses		1,231,346
Net Investment Loss		(197,454	)
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency:
Net realized gain on investments		10,429,021
Net realized loss on foreign currency transactions		(2,137	)
Net realized gain/(loss) on investments and foreign currency transactions		10,426,884
Net change in unrealized appreciation/depreciation:
on investments		16,290,779
on foreign currency translations		1,519
Net change in unrealized appreciation/depreciation on investments and foreign currency translations		16,292,298
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency		26,719,182
Net Increase in Net Assets Resulting from Operations	$	26,521,728

See accompanying notes to financial statements.

9

The Gabelli Global Growth Fund

Statement of Changes in Net Assets

	Year Ended			Year Ended
	December 31, 2019			December 31, 2018
Operations:
Net investment loss	$	(197,454	)	$	(110,960	)
Net realized gain on investments and foreign currency transactions		10,426,884			6,712,433
Net change in unrealized appreciation/depreciation on investments and foreign currency translations		16,292,298			(9,343,747	)
Net Increase/(Decrease) in Net Assets Resulting from Operations		26,521,728			(2,742,274	)
Distributions to Shareholders:
Accumulated earnings
Class AAA		(8,172,493	)		(5,615,445	)
Class A		(495,166	)		(300,099	)
Class C		(263,622	)		(145,703	)
Class I		(1,497,399	)		(621,946	)
Total Distributions to Shareholders		(10,428,680	)		(6,683,193	)
Capital Share Transactions:
Class AAA		2,959,549			1,610,344
Class A		725,983			642,296
Class C		831,343			301,162
Class I		6,601,878			3,815,923
Net Increase in Net Assets from Capital Share Transactions		11,118,753			6,369,725
Redemption Fees		409			6
Net Increase/(Decrease) in Net Assets		27,212,210			(3,055,736	)
Net Assets:
Beginning of year		85,570,993			88,626,729
End of year	$	112,783,203		$	85,570,993

See accompanying notes to financial statements.

10

The Gabelli Global Growth Fund

Financial Highlights

Selected data for a share of capital stock outstanding throughout each year:

				Income (Loss) from Investment Operations												Distributions																									Ratios to Average Net Assets/ Supplemental Data
Year Ended December 31	Net Asset Value, Beginning of Year			Net Investment Income (Loss)(a)				Net Realized and Unrealized Gain (Loss) on Investments				Total from Investment Operations				Net Investment Income				Net Realized Gain				Return of Capital				Total Distributions				Redemption Fees (a)(b)			Net Asset Value, End of Period			Total Return†			Net Assets End of Year (in 000’s)			Net Investment Income (Loss)			Operating Expenses Before Reimbursement			Operating Expenses Net of Reimbursement			Portfolio Turnover Rate
Class AAA
2019		$	29.94		$	(0.07	)		$	9.29			$	9.22				—			$	(3.60	)			—			$	(3.60	)		$	0.00		$	35.56		30.7	%		$	88,287		(0.21	)%		1.63	%		1.22	%(c)		78	%
2018			33.42			(0.05	)			(0.91	)			(0.96	)			—				(2.52	)			—				(2.52	)			0.00			29.94		(2.8	)			71,877		(0.14	)		1.68			1.42	(c)(d)		58
2017			26.72			(0.13	)			7.89				7.76				—				(1.05	)		$	(0.01	)			(1.06	)			0.00			33.42		29.0				77,829		(0.42	)		1.67			1.67	(d)		43
2016			28.27			0.12				0.22				0.34			$	(0.13	)			(1.76	)			—				(1.89	)			—			26.72		1.2				64,574		0.44			1.72			1.72	(d)(e)		63
2015			30.23			(0.03	)			(0.31	)			(0.34	)			(0.02	)			(1.60	)			—				(1.62	)			0.00			28.27		(1.2	)			72,882		(0.10	)		1.68			1.68	(d)		53
Class A
2019		$	29.93		$	(0.08	)		$	9.30			$	9.22				—			$	(3.60	)			—			$	(3.60	)		$	0.00		$	35.55		30.7	%		$	5,332		(0.21	)%		1.63	%		1.22	%(c)		78	%
2018			33.41			(0.05	)			(0.91	)			(0.96	)			—				(2.52	)			—				(2.52	)			0.00			29.93		(2.8	)			3,861		(0.14	)		1.68			1.41	(c)(d)		58
2017			26.72			(0.13	)			7.88				7.75				—				(1.05	)		$	(0.01	)			(1.06	)			0.00			33.41		29.0				3,652		(0.43	)		1.67			1.67	(d)		43
2016			28.26			0.12				0.23				0.35			$	(0.14	)			(1.75	)			—				(1.89	)			—			26.72		1.3				3,143		0.44			1.72			1.72	(d)(e)		63
2015			30.22			(0.03	)			(0.32	)			(0.35	)			(0.01	)			(1.60	)			—				(1.61	)			0.00			28.26		(1.2	)			3,580		(0.08	)		1.68			1.68	(d)		53
Class C
2019		$	25.18		$	(0.25	)		$	7.78			$	7.53				—			$	(3.60	)			—			$	(3.60	)		$	0.00		$	29.11		29.8	%		$	2,598		(0.84	)%		2.38	%		1.87	%(c)		78	%
2018			28.73			(0.28	)			(0.75	)			(1.03	)			—				(2.52	)			—				(2.52	)			0.00			25.18		(3.5	)			1,561		(0.93	)		2.43			2.15	(c)(d)		58
2017			23.26			(0.32	)			6.85				6.53				—				(1.05	)		$	(0.01	)			(1.06	)			0.00			28.73		28.0				1,479		(1.19	)		2.42			2.42	(d)		43
2016			24.91			(0.07	)			0.18				0.11				—				(1.76	)			—				(1.76	)			—			23.26		0.4				1,232		(0.30	)		2.47			2.47	(d)(e)		63
2015			27.01			(0.23	)			(0.27	)			(0.50	)			—				(1.60	)			—				(1.60	)			0.00			24.91		(1.9	)			1,891		(0.86	)		2.43			2.43	(d)		53
Class I
2019		$	30.55		$	0.01			$	9.49			$	9.50				—			$	(3.60	)			—			$	(3.60	)		$	0.00		$	36.45		31.0	%		$	16,566		0.03	%		1.38	%		0.99	%(c)		78	%
2018			33.90			0.09				(0.92	)			(0.83	)			—				(2.52	)			—				(2.52	)			0.00			30.55		(2.4	)			8,272		0.26			1.43			1.00	(c)(d)		58
2017			26.92			0.07				7.97				8.04				—				(1.05	)		$	(0.01	)			(1.06	)			0.00			33.90		29.8				5,667		0.24			1.42			1.00	(c)(d)		43
2016			28.47			0.33				0.23				0.56			$	(0.35	)			(1.76	)			—				(2.11	)			—			26.92		2.0				2,975		1.18			1.47			1.00	(c)(d)(e)		63
2015			30.42			0.17				(0.30	)			(0.13	)			(0.22	)			(1.60	)			—				(1.82	)			0.00			28.47		(0.5	)			3,102		0.54			1.43			1.00	(c)(d)		53

  † Total return represents aggregate total return of a hypothetical $1,000 investment at the beginning of the year and sold at the end of the year including reinvestment of distributions and does not reflect the applicable sales charges.

(a) Per share amounts have been calculated using the average shares outstanding method.

(b) Amount represents less than $0.005 per share.

(c) Under an expense reimbursement agreement with the Adviser, the Adviser reimbursed expenses of $412,641 and $261,050 for the years ended December 31, 2019 and 2018 and certain Class I expenses to the Fund of $19,466, $14,648, and $12,486 for the years ended December 31, 2017, 2016, and 2015, respectively.

(d) The Fund received credits from a designated broker who agreed to pay certain Fund operating expenses. For the years ended December 31, 2018, 2017, 2016, and 2015, there was no impact to the expense ratios.

(e) During the year ended December 31, 2016, the Fund received reimbursements of custody expenses paid in prior years. Had such reimbursement (allocated by relative net asset values of the Fund’s share classes) been included in that period, the expense ratios would have been 1.20% (Class AAA), 1.21% (Class A), 1.96% (Class C), and 0.47% (Class I).

See accompanying notes to financial statements.

11

The Gabelli Global Growth Fund

Notes to Financial Statements

1. Organization.Effective December 27, 2019, The GAMCO Global Growth Fund changed its name to The Gabelli Global Growth Fund. The Fund, a series of GAMCO Global Series Funds, Inc. (the Corporation), was incorporated on July 16, 1993 in Maryland. The Fund is anon-diversifiedopen-end management investment company registered under the Investment Company Act of 1940, as amended (the 1940 Act), and is one of five separately managed portfolios (collectively, the Portfolios) of the Corporation. The Fund’s primary objective is capital appreciation. The Fund commenced investment operations on February 7, 1994.

2. Significant Accounting Policies.As an investment company, the Fund follows the investment company accounting and reporting guidance, which is part of U.S. generally accepted accounting principles (GAAP) that may require the use of management estimates and assumptions in the preparation of its financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

New Accounting Pronouncements.To improve the effectiveness of fair value disclosure requirements, the Financial Accounting Standards Board recently issued Accounting Standard Update (ASU)2018-13, Fair Value Measurement Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU2018-13), which adds, removes, and modifies certain aspects relating to fair value disclosure. ASU2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption of the additions relating to ASU2018-13 is not required, even if early adoption is elected for the removals and modifications under ASU2018-13. Management has early adopted the removals and modifications set forth in ASU2018-13 in these financial statements and has not early adopted the additions set forth in ASU2018-13.

Security Valuation.Portfolio securities listed or traded on a nationally recognized securities exchange or traded in the U.S.over-the-counter market for which market quotations are readily available are valued at the last quoted sale price or a market’s official closing price as of the close of business on the day the securities are being valued. If there were no sales that day, the security is valued at the average of the closing bid and asked prices or, if there were no asked prices quoted on that day, then the security is valued at the closing bid price on that day. If no bid or asked prices are quoted on such day, the security is valued at the most recently available price or, if the Board of Directors (the Board) so determines, by such other method as the Board shall determine in good faith to reflect its fair market value. Portfolio securities traded on more than one national securities exchange or market are valued according to the broadest and most representative market, as determined by Gabelli Funds, LLC (the Adviser).

Portfolio securities primarily traded on a foreign market are generally valued at the preceding closing values of such securities on the relevant market, but may be fair valued pursuant to procedures established by the Board if market conditions change significantly after the close of the foreign market, but prior to the close of business on the day the securities are being valued. Debt obligations for which market quotations are readily available are valued at the average of the latest bid and asked prices. If there were no asked prices quoted on such day, the security is valued using the closing bid price. Such debt obligations are valued through prices provided by a pricing service approved by the Board. Certain securities are valued principally using dealer quotations.

Securities and assets for which market quotations are not readily available are fair valued as determined by the Board. Fair valuation methodologies and procedures may include, but are not limited to: analysis and review of available financial andnon-financial information about the company; comparisons with the valuation and

12

The Gabelli Global Growth Fund

Notes to Financial Statements (Continued)

changes in valuation of similar securities, including a comparison of foreign securities with the equivalent U.S. dollar value American Depositary Receipt securities at the close of the U.S. exchange; and evaluation of any other information that could be indicative of the value of the security.

The Fund employs a fair value model to adjust prices to reflect events affecting the values of certain portfolio securities which occur between the close of trading on the principal market for such securities (foreign exchanges andover-the-counter markets) at the time when net asset values of the Fund are determined. If the Fund’s valuation committee believes that a particular event would materially affect net asset value, further adjustment is considered.

The inputs and valuation techniques used to measure fair value of the Fund’s investments are summarized into three levels as described in the hierarchy below:

● Level 1  —  quoted prices in active markets for identical securities;

● Level 2  —  other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.); and

● Level 3  —  significant unobservable inputs (including the Board’s determinations as to the fair value of investments).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input both individually and in the aggregate that is significant to the fair value measurement. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. The closing price is adjusted from the local close, therefore, such securities are classified as Level 2 in the fair value hierarchy presented below. The summary of the Fund’s investments in securities by inputs used to value the Fund’s investments as of December 31, 2019 is as follows:

	Valuation Inputs
	Level 1 Quoted Prices		Level 2 Other Significant Observable Inputs		Total Market Value at 12/31/19
INVESTMENTS IN SECURITIES:
ASSETS (Market Value):
Common Stocks (a)		$112,422,022		��		$112,422,022
U.S. Government Obligations		—		$421,633		421,633
TOTAL INVESTMENTS IN SECURITIES – ASSETS		$112,422,022		$421,633		$112,843,655

(a) Please refer to the Schedule of Investments for the industry classifications of these portfolio holdings.

The Fund held no level 3 investments at December 31, 2019 and 2018.

Additional Information to Evaluate Qualitative Information.

General.The Fund uses recognized industry pricing services – approved by the Board and unaffiliated with the Adviser – to value most of its securities, and uses broker quotes provided by market makers of securities not valued by these and other recognized pricing sources. Several different pricing feeds are received to value domestic equity securities, international equity securities, preferred equity securities, and fixed income securities. The data within these feeds are ultimately sourced from major stock exchanges and trading systems where these securities trade. The prices supplied by external sources are checked by obtaining quotations or actual

13

The Gabelli Global Growth Fund

Notes to Financial Statements (Continued)

transaction prices from market participants. If a price obtained from the pricing source is deemed unreliable, prices will be sought from another pricing service or from a broker/dealer that trades that security or similar securities.

Fair Valuation.Fair valued securities may be common or preferred equities, warrants, options, rights, or fixed income obligations. Where appropriate, Level 3 securities are those for which market quotations are not available, such as securities not traded for several days, or for which current bids are not available, or which are restricted as to transfer. When fair valuing a security, factors to consider include recent prices of comparable securities that are publicly traded, reliable prices of securities not publicly traded, the use of valuation models, current analyst reports, valuing the income or cash flow of the issuer, or cost if the preceding factors do not apply. The circumstances of Level 3 securities are frequently monitored to determine if fair valuation measures continue to apply.

The Adviser reports quarterly to the Board the results of the application of fair valuation policies and procedures. These may include backtesting the prices realized in subsequent trades of these fair valued securities to fair values previously recognized.

Foreign Currency Translations.The books and records of the Fund are maintained in U.S. dollars. Foreign currencies, investments, and other assets and liabilities are translated into U.S. dollars at current exchange rates. Purchases and sales of investment securities, income, and expenses are translated at the exchange rate prevailing on the respective dates of such transactions. Unrealized gains and losses that result from changes in foreign exchange rates and/or changes in market prices of securities have been included in unrealized appreciation/depreciation on investments and foreign currency translations. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of interest and dividends recorded on the books of the Fund and the amounts actually received. The portion of foreign currency gains and losses related to fluctuation in exchange rates between the initial purchase trade date and subsequent sale trade date is included in realized gain/(loss) on investments.

Foreign Securities.The Fund may directly purchase securities of foreign issuers. Investing in securities of foreign issuers involves special risks not typically associated with investing in securities of U.S. issuers. The risks include possible revaluation of currencies, the inability to repatriate funds, less complete financial information about companies, and possible future adverse political and economic developments. Moreover, securities of many foreign issuers and their markets may be less liquid and their prices more volatile than securities of comparable U.S. issuers.

Foreign Taxes.The Fund may be subject to foreign taxes on income, gains on investments, or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Securities Transactions and Investment Income.Securities transactions are accounted for on the trade date with realized gain or loss on investments determined by using the identified cost method. Interest income (including amortization of premium and accretion of discount) is recorded on an accrual basis. Premiums and discounts on debt securities are amortized using the effective yield to maturity method. Dividend income is recorded on

14

The Gabelli Global Growth Fund

Notes to Financial Statements (Continued)

theex-dividend date, except for certain dividends from foreign securities that are recorded as soon after theex-dividend date as the Fund becomes aware of such dividends.

Determination of Net Asset Value and Calculation of Expenses.Certain administrative expenses are common to, and allocated among, various affiliated funds. Such allocations are made on the basis of each fund’s average net assets or other criteria directly affecting the expenses as determined by the Adviser pursuant to procedures established by the Board.

In calculating NAV per share of each class, investment income, realized and unrealized gains and losses, redemption fees, and expenses other than class specific expenses are allocated daily to each class of shares based upon the proportion of net assets of each class at the beginning of each day. Distribution expenses are borne solely by the class incurring the expense.

Distributions to Shareholders.Distributions to shareholders are recorded on theex-dividend date. Distributions to shareholders are based on income and capital gains as determined in accordance with federal income tax regulations, which may differ from income and capital gains as determined under GAAP. These differences are primarily due to differing treatments of income and gains on various investment securities and foreign currency transactions held by the Fund, timing differences, and differing characterizations of distributions made by the Fund. Distributions from net investment income for federal income tax purposes include net realized gains on foreign currency transactions. These book/tax differences are either temporary or permanent in nature. To the extent these differences are permanent, adjustments are made to the appropriate capital accounts in the period when the differences arise. Permanent differences were primarily due to the tax treatment of realized foreign currency gains and capital gain adjustment on sale of real estate investment trusts. These reclassifications have no impact on the NAV of the Fund. These reclassifications have no impact on the NAV of the Fund. For the year ended December 31, 2019, reclassifications were made to decreasepaid-in capital by $3,611, with an offsetting adjustment to total distributable earnings.

The tax character of distributions paid during the years ended December 31, 2019 and 2018 was as follows:

	Year Ended December 31, 2019		Year Ended December 31, 2018
Distributions paid from:
Net long term capital gains		$10,428,680		$6,683,193
Total distributions paid		$10,428,680		$6,683,193

Provision for Income Taxes.The Fund intends to continue to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended (the Code). It is the policy of the Fund to comply with the requirements of the Code applicable to regulated investment companies and to distribute substantially all of its net investment company taxable income and net capital gains. Therefore, no provision for federal income taxes is required.

At December 31, 2019, the components of accumulated earnings/losses on a tax basis were as follows:

Undistributed ordinary income	$	6,982
Undistributed long term capital gains		57,101
Net unrealized appreciation on investments and foreign currency translations		40,291,367
Total	$	40,355,450

15

The Gabelli Global Growth Fund

Notes to Financial Statements (Continued)

The Fund is permitted to carry capital losses forward for an unlimited period. Capital losses that are carried forward will retain their character as either short term or long term capital losses.

At December 31, 2019, the temporary differences between book basis and tax basis net unrealized appreciation on investments were due to losses from wash sales for tax purposes,mark-to-market adjustments on investments no longer considered a passive foreign investment company and basis adjustments for litigation gains.

The following summarizes the tax cost of investments and the related net unrealized appreciation at December 31, 2019:

	Cost	Gross Unrealized Appreciation	Gross Unrealized Depreciation	Net Unrealized Appreciation
Investments	$72,552,878	$40,436,951	$(146,174)	$40,290,777

The Fund is required to evaluate tax positions taken or expected to be taken in the course of preparing the Fund’s tax returns to determine whether the tax positions are“more-likely-than-not” of being sustained by the applicable tax authority. Income tax and related interest and penalties would be recognized by the Fund as tax expense in the Statement of Operations if the tax positions were deemed not to meet themore-likely-than-not threshold. During the year ended December 31, 2019, the Fund did not incur any income tax, interest, or penalties. As of December 31, 2019, the Adviser has reviewed all open tax years and concluded that there was no impact to the Fund’s net assets or results of operations. The Fund’s federal and state tax returns for the prior three fiscal years remain open, subject to examination. On an ongoing basis, the Adviser will monitor the Fund’s tax positions to determine if adjustments to this conclusion are necessary.

3. Investment Advisory Agreement and Other Transactions.The Fund has entered into an investment advisory agreement (the Advisory Agreement) with the Adviser which provides that the Fund will pay the Adviser a fee, computed daily and paid monthly, at the annual rate of 1.00% of the value of its average daily net assets. In accordance with the Advisory Agreement, the Adviser provides a continuous investment program for the Fund’s portfolio, oversees the administration of all aspects of the Fund’s business and affairs, and pays the compensation of all Officers and Directors of the Fund who are affiliated persons of the Adviser.

Through November 30, 2019, the Adviser had agreed to waive and/or to reimburse expenses of the Fund to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) at no more than 1.25%, 1.25%, 2.00%, and 1.00% of the value of the Fund’s average daily net assets for Class AAA, Class A, Class C, and Class I Shares, respectively. Effective December 1, 2019, the Adviser amended its contractual agreement with respect to each share class of the Fund to waive its investment advisory fees and/or to reimburse expenses to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) until at least April 30, 2021, at no more than 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. During the year ended December 31, 2019, the Adviser reimbursed the Fund in the amount of $412,641. In addition, the Fund has agreed, during the two year period following any waiver or reimbursement by the Adviser, to repay such amount to the extent, that after giving effect to the repayment, such adjusted annualized total operating expenses of the Fund would not exceed 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. The agreement is renewable annually. At December 31, 2019, the cumulative amount which the Fund may repay the Adviser, subject to the terms above, is $673,691:

16

The Gabelli Global Growth Fund

Notes to Financial Statements (Continued)

For the year ended December 31, 2018, expiring December 31, 2020	$261,050
For the year ended December 31, 2019, expiring December 31, 2021	412,641
	$673,691

The Corporation pays each Director who is not considered to be an affiliated person an annual retainer of $6,000 plus $1,000 for each Board meeting attended and they are reimbursed for any out of pocket expenses incurred in attending meetings. All Board committee members receive $1,000 per meeting attended. The Chairman of the Audit Committee receives an annual fee of $3,000, and the Lead Director receives an annual fee of $2,000. A Director may receive a single meeting fee, allocated among the participating funds, for attending certain meetings held on behalf of multiple funds. Directors who are directors or employees of the Adviser or an affiliated company receive no compensation or expense reimbursement from the Corporation.

4. Distribution Plan.The Fund’s Board has adopted a distribution plan (the Plan) for each class of shares, except for Class I Shares, pursuant to Rule12b-1 under the 1940 Act. Under the Class AAA, Class A, and Class C Share Plans, payments are authorized to G.distributors, LLC (the Distributor), an affiliate of the Adviser, at annual rates of 0.25%, 0.25%, and 1.00%, respectively, of the average daily net assets of those classes, the annual limitations under each Plan. Such payments are accrued daily and paid monthly.

5. Portfolio Securities.Purchases and sales of securities during the year ended December 31, 2019, other than short term securities and U.S. Government obligations, aggregated $78,660,738 and $78,384,438 respectively.

6. Transactions with Affiliates and Other Arrangements.During the year ended December 31, 2019, the Distributor retained a total of $7,326 from investors representing commissions (sales charges and underwriting fees) on sales and redemptions of Fund shares.

The cost of calculating the Fund’s NAV per share is a Fund expense pursuant to the Advisory Agreement. Under thesub-administration agreement with Bank of New York Mellon, the fees paid include the cost of calculating the Fund’s NAV. The Fund reimburses the Adviser for this service. During the year ended December 31, 2019, the Fund accrued $45,000 in accounting fees in the Statement of Operations.

7. Line of Credit.The Fund participates in an unsecured line of credit which expires on March 4, 2020 and may be renewed annually, of up to $75,000,000 under which it may borrow up to 10% of its net assets from the custodian for temporary borrowing purposes. Borrowings under this arrangement bear interest at a floating rate equal to the higher of the overnight Federal Funds rate plus 125 basis points or the 30 day ICE LIBOR plus 125 basis points in effect on that day. This amount, if any, would be included in “Interest expense” in the Statement of Operations. At December 31, 2019, there were no borrowings outstanding under the line of credit.

The average daily amount of borrowings outstanding under the line of credit during the year ended December 31, 2019 was $5,562, with a weighted average interest rate of 3.59%. The maximum amount borrowed at any time during the year ended December 31, 2019 was $447,000.

8. Capital Stock.The Fund offers four classes of shares – Class AAA Shares, Class A Shares, Class C Shares, and Class I Shares. Class AAA and Class I Shares are offered without a sales charge. Class A Shares are subject to a maximumfront-end sales charge of 5.75%, and Class C Shares are subject to a 1.00% contingent deferred sales charge for one year after purchase.

17

The Gabelli Global Growth Fund

Notes to Financial Statements (Continued)

The Fund imposes a redemption fee of 2.00% on all classes of shares that are redeemed or exchanged on or before the seventh day after the date of a purchase. The redemption fee is deducted from the proceeds otherwise payable to the redeeming shareholders and is retained by the Fund as an increase inpaid-in capital. The redemption fees retained by the Fund during the years ended December 31, 2019 and 2018, if any, can be found in the Statement of Changes in Net Assets under Redemption Fees.

Transactions in shares of capital stock were as follows:

	Year Ended December 31, 2019						Year Ended December 31, 2018
	Shares			Amount			Shares			Amount
Class AAA
Shares sold		137,319		$	4,874,691			136,173		$	4,880,317
Shares issued upon reinvestment of distributions		218,229			7,797,329			181,172			5,369,927
Shares redeemed		(273,816	)		(9,712,471	)		(245,663	)		(8,639,900	)
Net increase		81,732		$	2,959,549			71,682		$	1,610,344
Class A
Shares sold		46,943		$	1,656,674			34,268		$	1,224,568
Shares issued upon reinvestment of distributions		13,558			484,299			9,919			293,888
Shares redeemed		(39,502	)		(1,414,990	)		(24,503	)		(876,160	)
Net increase		20,999		$	725,983			19,684		$	642,296
Class C
Shares sold		58,617		$	1,748,319			27,281		$	823,174
Shares issued upon reinvestment of distributions		8,440			246,854			5,166			128,791
Shares redeemed		(39,783	)		(1,163,830	)		(21,924	)		(650,803	)
Net increase		27,274		$	831,343			10,523		$	301,162
Class I
Shares sold		182,452		$	6,544,921			187,265		$	6,867,629
Shares issued upon reinvestment of distributions		40,122			1,469,262			19,945			603,136
Shares redeemed		(38,894	)		(1,412,305	)		(103,621	)		(3,654,842	)
Net increase		183,680		$	6,601,878			103,589		$	3,815,923

9. Indemnifications.The Fund enters into contracts that contain a variety of indemnifications. The Fund’s maximum exposure under these arrangements is unknown. However, the Fund has not had prior claims or losses pursuant to these contracts. Management has reviewed the Fund’s existing contracts and expects the risk of loss to be remote.

10. Subsequent Events.Management has evaluated the impact on the Fund of all subsequent events occurring through the date the financial statements were issued and has determined that there were no subsequent events requiring recognition or disclosure in the financial statements.

18

The Gabelli Global Growth Fund

Report of Independent Registered Public Accounting Firm

To the Shareholders of The Gabelli Global Growth Fund

and the Board of Directors of GAMCO Global Series Funds, Inc.

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of The Gabelli Global Growth Fund (the “Fund”) (one of the funds constituting GAMCO Global Series Funds, Inc. (the “Corporation”)), including the schedule of investments, as of December 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund (one of the funds constituting GAMCO Global Series Funds, Inc.) at December 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and its financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Corporation’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Corporation in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Corporation is not required to have, nor were we engaged to perform, an audit of the Corporation’s internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Corporation’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2019, by correspondence with the custodian. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the auditor of one or more Gabelli/GAMCO Funds investment companies since 1992.

Philadelphia, Pennsylvania

February 27, 2020

19

The Gabelli Global Growth Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited)

During the six months ended December 31, 2019, the Board of Directors of the Corporation approved the continuation of the investment advisory agreement with the Adviser for the Fund on the basis of the recommendation by the directors (the Independent Board Members) who are not interested persons of the Fund. The following paragraphs summarize the material information and factors considered by the Independent Board Members as well as their conclusions relative to such factors.

Nature, Extent, and Quality of Services.The Independent Board Members considered information regarding the Fund’s portfolio managers, the depth of the analyst pool available to the Adviser and the portfolio managers, the scope of supervisory, administrative, shareholder, and other services supervised or provided by the Adviser and the absence of significant service problems reported to the Board. The Independent Board Members noted the experience, length of service, and reputation of the Fund’s portfolio managers.

Investment Performance.The Independent Board Members reviewed the short, medium, and long term performance of the Fund (as of September 30, 2019) against a peer group of seven other comparable funds prepared by the Adviser (the Adviser Peer Group), and against a peer group prepared by Broadridge (the Broadridge Performance Peer Group) consisting of all global large cap growth funds, regardless of asset size or primary channel of distribution, as represented by the Lipper GlobalLarge-Cap Growth Index. The Independent Board Members noted that the Fund’s performance was in the second quartile for the one year period and in the first (highest) quartile for the three, five, and ten year periods, as measured against the Adviser Peer Group. Against the Broadridge Performance Peer Group, the Independent Board Members noted that the Fund’s performance was in the third quintile for the one year period, the first quintile for the three year period, the second quintile for the five year period, and the first quintile for the ten year period.

Profitability.The Independent Board Members reviewed summary data regarding the profitability of the Fund to the Adviser both with a pro rata administrative overhead charge and with a stand alone administrative charge and noted the effect of the expense limitation agreement. The Independent Board Members also noted that a portion of the Fund’s portfolio transactions were executed by an affiliated broker of the Adviser and that another affiliated broker of the Adviser received distribution fees and minor amounts of sales commissions.

Economies of Scale.The Independent Board Members discussed the major elements of the Adviser’s cost structure, the relationship of those elements to potential economies of scale and reviewed data provided by the Adviser.

Sharing of Economies of Scale.The Independent Board Members noted that the investment management fee schedule for the Fund does not take into account any potential economies of scale that may develop.

Service and Cost Comparisons.The Independent Board Members compared the expense ratios of the investment management fee, other expenses, and total expenses of the Fund with similar expense ratios of the Adviser Peer Group and a peer group of seven other global large cap growth funds selected by Broadridge, and noted that the Adviser’s management fee includes substantially all administrative services of the Fund as well as investment advisory services. The Independent Board Members noted the effect of the expense limitation agreement in place for the Fund. The Independent Board Members noted that the Fund’s total expense ratio was the highest in most of the categories for the Lipper peer group and in all for the Advisor peer group, but that the Fund’s size was below average within each peer group. The Independent Board Members also noted that the advisory fee structure was the same as that in effect for most of the Gabelli funds. The Independent Board

20

The Gabelli Global Growth Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited) (Continued)

Members were presented with, but did not consider to be material to their decision, various information comparing the advisory fee with the fee for other types of accounts managed by the Adviser.

Conclusions.The Independent Board Members concluded that the Fund enjoyed highly experienced portfolio management services and good ancillary services and an acceptable performance record. The Independent Board Members also concluded that the Fund’s expense ratios and the profitability to the Adviser of managing the Fund were reasonable, and that economies of scale were not a significant factor in their thinking at this time. The Independent Board Members did not view the potential profitability of ancillary services as material to their decision. On the basis of the foregoing and without assigning particular weight to any single conclusion, the Independent Board Members determined to recommend continuation of the investment advisory agreement to the full Board.

Based on a consideration of all these factors in their totality, the Board Members, including all of the Independent Board Members, determined that the Fund’s advisory fee was fair and reasonable with respect to the quality of services provided and in light of the other factors described above that the Board deemed relevant. Accordingly, the Board Members determined to approve the continuation of the Fund’s Advisory Agreement. The Board Members based their decision on evaluations of all these factors as a whole and did not consider any one factor asall-important or controlling.

21

The Gabelli Global Growth Fund

Additional Fund Information (Unaudited)

The business and affairs of the Fund are managed under the direction of the Corporation’s Board of Directors. Information pertaining to the Directors and officers of the Fund is set forth below. The Corporation’s Statement of Additional Information includes additional information about the Fund’s Directors and is available without charge, upon request, by calling800-GABELLI(800-422-3554) or by writing to The Gabelli Global Growth Fund at One Corporate Center, Rye, NY 10580-1422.

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Number of Funds in Fund Complex Overseen by Director	Principal Occupation(s) During Past Five Years	Other Directorships Held by Director3
INTERESTED DIRECTORS4:
Mario J. Gabelli, CFA Director and Chief Investment Officer Age: 77	Since 1993	33	Chairman, Chief Executive Officer, and Chief Investment Officer– Value Portfolios of GAMCO Investors, Inc. and Chief Investment Officer–Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc.; Director/ Trustee or Chief Investment Officer of other registered investment companies within the Gabelli/GAMCO Fund Complex; Chief Executive Officer of GGCP, Inc.; Executive Chairman of Associated Capital Group, Inc.	Director of Morgan Group Holdings, Inc. (holding company) (2001-2019); Chairman of the Board and Chief Executive Officer of LICT Corp. (multimedia and communication services company); Director of CIBL, Inc. (broadcasting and wireless communications); Director of ICTC Group Inc. (communications) (2013-2018)
John D. Gabelli Director Age: 75	Since 1993	12	Senior Vice President of G.research, LLC	—
INDEPENDENT DIRECTORS5:
E. Val Cerutti Director Age: 80	Since 2001	7	Chief Executive Officer of Cerutti Consultants, Inc.	Director of The LGL Group, Inc. (diversified manufacturing) (1990-2009)
Anthony J. Colavita6 Director Age: 84	Since 1993	20	President of the law firm of Anthony J. Colavita, P.C.	—
Werner J. Roeder Director Age: 79	Since 1993	21	Retired physician; Former Vice President of Medical Affairs (Medical Director) of New York Presbyterian/Lawrence Hospital (1999-2014)	—
Anthonie C. van Ekris6 Director Age: 85	Since 1993	23	Chairman and Chief Executive Officer of BALMAC International, Inc. (global import/ export company)	—
Salvatore J. Zizza7 Director Age: 74	Since 2004	31	President of Zizza & Associates Corp. (private holding company); President of Bergen Cove Realty Inc.; Chairman of Harbor Diversified, Inc. (pharmaceuticals) (2009-2018); Chairman of BAM (semiconductor and aerospace manufacturing)(2000-2018); Chairman of Metropolitan Paper Recycling Inc. (recycling) (2005-2014)	Director and Chairman of Trans-Lux Corporation (business services); Director and Chairman of Harbor Diversified Inc. (pharmaceuticals) (2009-2018)

22

The Gabelli Global Growth Fund

Additional Fund Information (Continued) (Unaudited)

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Principal Occupation(s) During Past Five Years
OFFICERS:
Bruce N. Alpert President Age: 68	Since 1993	Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC since 1988; Officer of registered investment companies within the Gabelli/GAMCO Fund Complex; Senior Vice President of GAMCO Investors, Inc. since 2008
John C. Ball Treasurer Age: 43	Since 2017	Treasurer of funds within the Gabelli/GAMCO Fund Complex since 2017; Vice President and Assistant Treasurer of AMG Funds, 2014-2017; Vice President of State Street Corporation, 2007-2014
Agnes Mullady Vice President Age: 61	Since 2006	Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2006; President and Chief Operating Officer of the Fund Division of Gabelli Funds, LLC since 2015; Chief Executive Officer of G.distributors, LLC since 2010; Senior Vice President of GAMCO Investors, Inc. since 2009; Vice President of Gabelli Funds, LLC since 2007; Executive Vice President of Associated Capital Group, Inc. since 2016
Andrea R. Mango Secretary Age: 47	Since 2013	Vice President of GAMCO Investors, Inc. since 2016; Counsel of Gabelli Funds, LLC since 2013; Secretary of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013; Vice President ofclosed-end funds within the Gabelli/GAMCO Fund Complex since 2014
Richard J. Walz Chief Compliance Officer Age: 60	Since 2013	Chief Compliance Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013

¹  Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.

²  Each Director will hold office for an indefinite term until the earliest of (i) the next meeting of shareholders, if any, called for the purpose of considering the election orre-election of such Director and until the election and qualification of his or her successor, if any, elected at such meeting, or (ii) the date a Director resigns or retires, or a Director is removed by the Board of Directors or shareholders, in accordance with the Fund’sBy-Laws and Articles of Incorporation. For officers, includes time served in prior officer positions with the Fund. Each officer will hold office for an indefinite term until the date he or she resigns or retires or until his or her successor is elected and qualified.

³  This column includes only directorships of companies required to report to the SEC under the Securities Exchange Act of 1934, as amended, i.e., public companies, or other investment companies registered under the 1940 Act.

⁴  “Interested person” of the Corporation as defined in the 1940 Act. Messrs. Mario J. Gabelli and John D. Gabelli, who are brothers, are each considered an “interested person” because of their affiliation with Gabelli Funds, LLC which acts as the Corporation’s investment adviser.

⁵  Directors who are not interested persons are considered “Independent” Directors.

⁶  Mr. Colavita’s son, Anthony S. Colavita, serves as a director of other funds in the Gabelli/GAMCO Fund Complex. Mr. van Ekris is an independent director of Gabelli International Ltd., Gabelli Fund LDC, GAMA Capital Opportunities Master Ltd., and GAMCO International SICAV, which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and, in that event, would be deemed to be under common control with the Fund’s Adviser.

⁷  Mr. Zizza is an independent director of Gabelli International Ltd., which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and in that event would be deemed to be under common control with the Fund’s Adviser. On September 9, 2015, Mr. Zizza entered into a settlement with the SEC to resolve an inquiry relating to an alleged violation regarding the making of false statements or omissions to the accountants of a company concerning a related party transaction. The company in question is not an affiliate of, nor has any connection to, the Fund. Under the terms of the settlement, Mr. Zizza, without admitting or denying the SEC’s findings and allegation, paid $150,000 and agreed to cease and desist committing or causing any future violations of Rule13b2-2 of the Securities Exchange Act of 1934, as amended. The Board has discussed this matter and has determined that it does not disqualify Mr. Zizza from serving as an Independent Director.

23

Gabelli/GAMCO Funds and Your Personal Privacy

Who are we?

The Gabelli/GAMCO Funds are investment companies registered with the Securities and Exchange Commission under the Investment Company Act of 1940. We are managed by Gabelli Funds, LLC, which is affiliated with GAMCO Investors, Inc., a publicly held company with subsidiaries and affiliates that provide investment advisory services for a variety of clients.

What kind ofnon-public information do we collect about you if you become a fund shareholder?

If you apply to open an account directly with us, you will be giving us somenon-public information about yourself. Thenon-public information we collect about you is:

●  Information you give us on your application form. This could include your name, address, telephone number, social security number, bank account number, and other information.

●  Information about your transactions with us, any transactions with our affiliates, and transactions with the entities we hire to provide services to you.This would include information about the shares that you buy or redeem. If we hire someone else to provide services — like a transfer agent — we will also have information about the transactions that you conduct through them.

What information do we disclose and to whom do we disclose it?

We do not disclose anynon-public personal information about our customers or former customers to anyone other than our affiliates, our service providers who need to know such information, and as otherwise permitted by law. If you want to find out what the law permits, you can read the privacy rules adopted by the Securities and Exchange Commission. They are in volume 17 of the Code of Federal Regulations, Part 248. The Commission often posts information about its regulations on its website, www.sec.gov.

What do we do to protect your personal information?

We restrict access tonon-public personal information about you to the people who need to know that information in order to provide services to you or the fund and to ensure that we are complying with the laws governing the securities business. We maintain physical, electronic, and procedural safeguards to keep your personal information confidential.

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THE GABELLI GLOBAL GROWTH FUND

One Corporate Center

Rye, NY 10580-1422

Portfolio Management Team Biographies

Caesar M. P. Bryanjoined GAMCO Asset Management in 1994. He is a member of the global investment team of Gabelli Funds, LLC and portfolio manager of several funds within the Gabelli/GAMCO Fund Complex. Prior to joining Gabelli, Mr. Bryan was a portfolio manager at Lexington Management. He began his investment career at Samuel Montagu Company, the London based merchant bank. Mr. Bryan graduated from the University of Southampton in England with a Bachelor of Law and is a member of the English Bar.

Howard F. Ward, CFA,joined Gabelli Funds in 1995 and currently serves as GAMCO’s Chief Investment Officer of Growth Equities as well as a Gabelli Funds, LLC portfolio manager for several funds within the Gabelli/GAMCO Fund Complex. Prior to joining Gabelli, Mr. Ward served as Managing Director and Lead Portfolio Manager for several Scudder mutual funds. He also was an Investment Officer in the Institutional Investment Department with Brown Brothers, Harriman & Co. Mr. Ward received his BA in Economics from Northwestern University.

Christopher D. Ward, CFA,joined the GAMCO Growth Team in 2015 as Vice President and Research Analyst. Prior to joining Gabelli Funds, Mr. Ward spent five years at Morgan Stanley Private Wealth Management where he served as Director of Business Strategy for The Apollo Group. Before joining Morgan Stanley, he was with the GFI Group, Inc., a wholesale institutional brokerage firm. Mr. Ward is a Chartered Financial Analyst and a member of the New York Society of Security Analysts. He graduated from Boston College with a BA in Economics.

2019 TAX NOTICE TO SHAREHOLDERS(Unaudited)

For the year ended December 31, 2019, the Fund paid to shareholders long term capital gains totaling $10,428,680, or the maximum allowable. The distribution of long term capital gains has been designated as a capital gain dividend by the Fund’s Board of Directors.

All designations are based on financial information available as of the date of this annual report and, accordingly, are subject to change. For each item, it is the intention of the Fund to designate the maximum amount permitted under the Internal Revenue Code and the regulations thereunder.

We have separated the portfolio managers’ commentary from the financial statements and investment portfolio due to corporate governance regulations stipulated by the Sarbanes-Oxley Act of 2002. We have done this to ensure that the content of the portfolio managers’ commentary is unrestricted. Both the commentary and the financial statements, including the portfolio of investments, will be available on our website at www.gabelli.com.

GAMCO Global Series Funds, Inc.

THE GABELLI GLOBAL GROWTH FUND

One Corporate Center

Rye, New York 10580-1422

t	800-GABELLI(800-422-3554)
f	914-921-5118
e	info@gabelli.com
	GABELLI.com

Net Asset Value per share available daily

by calling800-GABELLI after 7:00 P.M.

BOARD OF DIRECTORS

OFFICERS

Mario J. Gabelli, CFA Chairman and Chief Executive Officer, GAMCO Investors, Inc. Executive Chairman, Associated Capital Group, Inc. E. Val Cerutti Chief Executive Officer, Cerutti Consultants, Inc. Anthony J. Colavita President, Anthony J. Colavita, P.C. John D. Gabelli Senior Vice President, G.research, LLC Werner J. Roeder Former Medical Director, Lawrence Hospital Anthonie C. van Ekris Chairman, BALMAC International, Inc. Salvatore J. Zizza Chairman, Zizza & Associates Corp.

Bruce N. Alpert President John C. Ball Treasurer Agnes Mullady Vice President Andrea R. Mango Secretary Richard J. Walz Chief Compliance Officer DISTRIBUTOR G.distributors, LLC CUSTODIAN State Street Bank and Trust Company TRANSFER AGENT AND DIVIDEND DISBURSING AGENT DST Asset Manager Solutions, Inc. LEGAL COUNSEL Skadden, Arps, Slate, Meagher & Flom LLP

This report is submitted for the general information of the shareholders of The Gabelli Global Growth Fund. It is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.

GAB442Q419AR

  The Gabelli International Small Cap Fund                Annual Report — December 31, 2019
Caesar M. P. Bryan Portfolio Manager

To Our Shareholders,

For the year ended December 31, 2019, the net asset value (NAV) per Class AAA Share of The Gabelli International Small Cap Fund increased 25.9% compared with an increase of 25.0% for the Morgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) Small Cap Index. Other classes of shares are available. See page 3 for performance information for all classes.

Enclosed are the financial statements, including the schedule of investments, as of December 31, 2019.

Performance Discussion (Unaudited)

The Fund’s objective is to provide investors with appreciation of capital. Current income is a secondary objective of the Fund.

The Fund’s investment strategy is to invest primarily in a portfolio of common stocks ofnon-U.S. companies. Under normal market conditions, the Fund will invest at least 80% of its net assets in the stocks of “small cap companies.” Gabelli Funds, LLC, the Adviser, currently characterizes small capitalization companies as those with total common stock market values of $3 billion or less at the time of investment.

The Fund may invest innon-U.S. markets throughout the world, including emerging markets. Ordinarily, the Fund will invest in the securities of at least five countries outside the U.S.

In selecting investments, the Adviser seeks issuers with a dominant market share or niche franchise in growing and/or consolidating industries. The Adviser considers for purchase the stocks of small capitalization companies with experienced management, strong balance sheets, and rising free cash flow and earnings. The Adviser’s goal is to invest long term in the stocks of companies trading at reasonable market valuations relative to perceived economic worth.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (www.gabelli.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. To elect to receive all future reports on paper free of charge, please contact your financial intermediary, or, if you invest directly with the Fund, you may call800-422-3554 or send an email request to info@gabelli.com.

The markets made it look easy in 2019. Stocks, bonds, oil and gold, all returned double-digits. Stocks advanced across market cap, geographies and sectors. The MSCI All Country World Index advanced +27%. The U.S. market outperformed developed international markets, which outperformed emerging markets. Large cap outperformed small cap. Growth outperformed value. Technology was a standout in 2019. The S&P 500 Information Technology sector gained +48%, a full 17 percentage points better than the next best sector, being Communication Services, which, surprise, surprise, is mostly technology stocks.

Selected holdings that contributed positively to performance in 2019 were: NagaCorp Ltd. (3.1% of net assets as of December 31, 2019), a leisure and tourism company with casino operations in Phnom Penh, the capital city of Cambodia. The company saw a 37.9% year on year increase in mass market table buy ins during the period, reporting a take of $1.22 billion. Electronic gaming machines also proved popular, seeing an increase of 27.9% to $2.05 billion. A 35.3% increase in rolling chip turnover from VIP gamblers, for a total of $33.87 billion, also served to give the property a huge boost; Zojirushi Corp. (2.4%), a Japanese multinational manufacturer and marketer of vacuum flasks, beverage dispensers and consumer appliances. The company’s profit per share rose compared with the previous year; and Hotel Chocolat Group plc (2.3%), which engages in the manufacturing and retailing of chocolate in the United Kingdom and overseas. Increased sales in second half of the year and the opening of nine new U.K. stores saw an increase in group revenues.

Some of our weaker performing holdings during the year were: Laurent Perrier (1.5%), which manufactures, distributes, and sells champagne globally. Shipments in the champagne market fell in terms of volume and operating cash flow decreased year on year; Rothschild & Co. (1.5%) is a multinational investment bank and financial services company. The company’s revenues, net income and earnings declined year on year largely because of increases in operating costs; and Sekisui Plastics Co. (1.2%), engages in the manufacturing and sale of foamed plastics and other materials. Operating income rose, but recurring income and net income fell due to the impact of foreign exchange and other factors.

Thank you for your investment in The Gabelli International Small Cap Fund.

We appreciate your confidence and trust.

2

Comparative Results

Average Annual Returns through December 31, 2019 (a) (Unaudited)
													Since
													Inception
	1 Year			5 Year			10 Year			15 Year			(5/11/98)
Class AAA (GABOX)		25.94	%		5.28	%		6.48	%		5.67	%		6.42	%
MSCI EAFE Small Cap Index		24.96			8.85			8.74			6.97			8.14	(b)
MSCI All Country (AC) World Index		26.60			8.41			8.79			6.86			5.58	(c)
Lipper GlobalLarge-Cap Growth Fund Classification		30.32			10.19			10.18			8.05			6.78
Lipper GlobalMulti-Cap Growth Fund Classification		29.26			9.26			9.37			6.74			5.18
Class A (GOCAX)		24.86			4.80			6.24			5.51			6.31
With sales charge (d)		17.68			3.57			5.62			5.10			6.02
Class C (GGLCX)		24.01			4.13			5.50			4.75			5.83
With contingent deferred sales charge (e)		23.01			4.13			5.50			4.75			5.83
Class I (GLOIX)		26.04			5.72			6.87			5.96			6.63

In the current prospectuses dated April 30, 2019, as amended by the supplement dated December 3, 2019, the gross expense ratios for Class AAA, A, C, and I Shares are 3.11%, 3.11%, 3.86%, and 2.86%, respectively, and the net expense ratio for all share classes after contractual reimbursements by Gabelli Funds, LLC, (the Adviser) is 0.90%. See page 10 for the expense ratios for the year ended December 31, 2019. The contractual reimbursements are in effect through April 30, 2021. Class AAA and Class I Shares do not have a sales charge. The maximum sales charge for Class A Shares and Class C Shares is 5.75% and 1.00%, respectively.

(a) Returns represent past performance and do not guarantee future results. Total returns and average annual returns reflect changes in share price, reinvestment of distributions, and are net of expenses. Investment returns and the principal value of an investment will fluctuate. When shares are redeemed, they may be worth more or less than their original cost. Current performance may be lower or higher than the performance data presented. Visit www.gabelli.com for performance information as of the most recent month end. Returns would have been lower had the Adviser not reimbursed certain expenses of the Fund. The Fund imposes a 2% redemption fee on shares sold or exchanged within seven days of purchase. Investors should carefully consider the investment objectives, risks, charges, and expenses of the Fund before investing. The prospectuses contain information about these and other matters and should be read carefully before investing. To obtain a prospectus, please visit our website at www.gabelli.com.Investing in foreign securities involves risks not ordinarily associated with investments in domestic issues, including currencyfluctuation, economic, and political risks. The Class AAA Share NAVs are used to calculate performance for the periods prior to the issuance of Class A Shares, Class C Shares, and Class I Shares on March 12, 2000, November 23, 2001, and January 11, 2008, respectively. The actual performance of the Class A Shares and Class C Shares would have been lower due to the additional fees and expenses associated with these classes of shares. The actual performance of the Class I Shares would have been higher due to lower expenses related to this class of shares. The MSCI EAFE Small Cap Index has 2,304 constituents and captures small cap representation across Developed Markets countries around the world, excluding the U.S. and Canada. The MSCI AC World Index is an unmanaged market capitalization weighted index that is designed to measure the equity market performance of developed and emerging markets. The MSCI AC World Index consists of 45 country indices comprising 24 developed and 21 emerging market country indices. The Lipper GlobalLarge-Cap Growth Fund Classification and the Lipper GlobalMulti-Cap Growth Fund Classification reflect the average performance of mutual funds classified in those particular categories. Dividends are considered reinvested. You cannot invest directly in an index.

(b) MSCI EAFE Small Cap Index inception date is December 31, 1998.

(c) The MSCI AC World Index since inception performance is as of April 30, 1994.

(d) Performance results include the effect of the maximum 5.75% sales charge at the beginning of the period.

(e) Assuming payment of the 1% maximum contingent deferred sales charge imposed on redemptions made within one year of purchase.

COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN

THE GABELLI INTERNATIONAL SMALL CAP FUND (CLASS AAA SHARES), LIPPER GLOBAL

MULTI-CAP GROWTH FUND CLASSIFICATION, MSCI AC WORLD INDEX, AND MSCI EAFE SMALL CAP INDEX (Unaudited)

^*  Past performance is not predictive of future results. The performance tables and graph do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares.

3

The Gabelli International Small Cap Fund
Disclosure of Fund Expenses (Unaudited)
For the Six Month Period from July 1, 2019 through December 31, 2019	Expense Table

We believe it is important for you to understand the impact of fees and expenses regarding your investment. All mutual funds have operating expenses. As a shareholder of a fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund’s gross income, directly reduce the investment return of a fund. When a fund’s expenses are expressed as a percentage of its average net assets, this figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your Fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The Expense Table below illustrates your Fund’s costs in two ways:

Actual Fund Return:This section provides informationabout actual account values and actual expenses. You may use this section to help you to estimate the actual expenses that you paid over the period after any fee waivers and expense reimbursements. The “Ending Account Value” shown is derived from the Fund’sactualreturn during the past six months, and the“Expenses Paid During Period” shows the dollar amount that would have been paid by an investor who started with $1,000 in the Fund. You may use this information, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your Fund under the heading “Expenses Paid During Period” to estimate the expenses you paid during this period.

Hypothetical 5% Return:This section providesinformation about hypothetical account values and

hypothetical expenses based on the Fund’s actual expense ratio. It assumes a hypothetical annualized return of 5% before expenses during the period shown. In this case – because the hypothetical return used isnot the Fund’s actual return – the results do not apply to your investment and you cannot use the hypothetical account value and expense to estimate the actual ending account balance or expenses you paid for the period. This example is useful in making comparisons of the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs such as sales charges (loads), redemption fees, or exchange fees, if any, which are described in the Prospectus. If these costs were applied to your account, your costs would be higher. Therefore, the 5% hypothetical return is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. The “Annualized Expense Ratio” represents the actual expenses for the last six months and may be different from the expense ratio in the Financial Highlights which is for the year ended December 31, 2019.

	Beginning Account Value 07/01/19	Ending Account Value 12/31/19		Annualized Expense Ratio		Expenses Paid During Period*
The Gabelli International Small Cap Fund
Actual Fund Return
Class AAA	$1,000.00		$1,130.90		0.98%		$ 5.26
Class A	$1,000.00		$1,126.20		1.80%		$ 9.65
Class C	$1,000.00		$1,122.50		2.42%		$12.95
Class I	$1,000.00		$1,131.30		0.98%		$ 5.26
Hypothetical 5% Return
Class AAA	$1,000.00		$1,020.27		0.98%		$ 4.99
Class A	$1,000.00		$1,016.13		1.80%		$ 9.15
Class C	$1,000.00		$1,013.01		2.42%		$12.28
Class I	$1,000.00		$1,020.27		0.98%		$ 4.99

* Expenses are equal to the Fund’s annualized expense ratio for the last six months multiplied by the average account value over the period, multiplied by the number of days in the most recent fiscal half year (184 days), then divided by 365.

4

Summary of Portfolio Holdings (Unaudited)

The following table presents portfolio holdings as a percent of net assets as of December 31, 2019:

The Gabelli International Small Cap Fund

Consumer Discretionary	19.2	%
Consumer Staples	17.4	%
Materials	12.6	%
Industrials	12.4	%
Health Care	10.6	%
Financials	8.9	%
Communication Services	6.9	%

Information Technology	6.0	%
Real Estate	4.0	%
U.S. Government Obligations	3.1	%
Utilities	0.2	%
Other Assets and Liabilities (Net)	(1.3	)%
	100.0	%

The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission (the SEC) for the first and third quarters of each fiscal year on FormN-PORT. Shareholders may obtain this information at www.gabelli.com or by calling the Fund at800-GABELLI(800-422-3554). The Fund’s FormN-PORT is available on the SEC’s website at www.sec.gov and may also be reviewed and copied at the SEC’s Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling800-SEC-0330.

Proxy Voting

The Fund files FormN-PX with its complete proxy voting record for the twelve months ended June 30, no later than August 31 of each year. A description of the Fund’s proxy voting policies, procedures, and how the Fund voted proxies relating to portfolio securities is available without charge, upon request, by (i) calling800-GABELLI(800-422-3554); (ii) writing to The Gabelli Funds at One Corporate Center, Rye, NY 10580-1422; or (iii) visiting the SEC’s website at www.sec.gov.

5

The Gabelli International Small Cap Fund

Schedule of Investments — December 31, 2019

					Market
Shares			Cost		Value
		COMMON STOCKS — 97.1%
		CONSUMER DISCRETIONARY — 19.2%
	5,555	AcadeMedia AB	$	39,150	$	32,679
	5,918	Aston Martin Lagonda Global Holdings plc†		76,447		40,747
	5,500	Beneteau SA		102,689		66,814
	7,000	Crest Nicholson Holdings plc		53,128		40,038
	10,000	Gamesys Group plc†		114,600		93,650
	11,820	GVC Holdings plc		107,595		138,438
	1,150	Hunter Douglas NV		94,649		74,818
	2,200	JINS Holdings Inc.		125,148		149,427
	25,000	Mandarin Oriental International Ltd.		61,939		45,500
	140,000	NagaCorp. Ltd.		91,176		244,344
	9,000	Scandic Hotels Group AB		117,117		100,317
	2,000	Tod’s SpA		132,379		92,473
	10,000	Treatt plc		57,375		60,932
	50,000	William Hill plc		142,702		124,811
	10,000	Zojirushi Corp.		93,734		189,407
		TOTAL CONSUMER DISCRETIONARY		1,409,828		1,494,395
		CONSUMER STAPLES — 17.4%
	800	Danone SA		47,829		66,315
	5,000	Glanbia plc		59,316		57,544
	30,000	Hotel Chocolat Group plc		131,832		176,835
	2,420	Interparfums SA		82,577		100,438
	2,700	Kameda Seika Co. Ltd.		112,789		123,874
	3,000	Kobe Bussan Co. Ltd.		94,197		103,539
	1,200	Laurent-Perrier		113,180		117,644
	3,000	Milbon Co. Ltd.		103,616		171,184
	60	Philip Morris CR AS		50,515		40,441
	80,000	Premier Foods plc†		43,658		40,109
	22,000	PZ Cussons plc		87,780		60,760
	4,000	Sakata Seed Corp.		118,342		134,922
	35,000	Stock Spirits Group plc		126,796		95,736
	1,300	Viscofan SA		75,483		68,682
		TOTAL CONSUMER STAPLES		1,247,910		1,358,023
		MATERIALS — 12.6%
	6,000	Alamos Gold Inc., Cl. A		44,345		36,120
	13,850	Alamos Gold Inc., Toronto, Cl. A		102,362		83,513
	18,000	B2Gold Corp.		51,262		72,219
	6,250	Castile Resources Pty Ltd.†(a)		0		0
	20,000	Centamin plc		41,668		33,645
	3,000	Detour Gold Corp.†		42,313		58,080
	3,000	Endeavour Mining Corp.†		60,421		56,671
	12,000	Hochschild Mining plc		46,101		29,088
	3,000	Labrador Iron Ore Royalty Corp.		51,466		56,879
	4,000	MAG Silver Corp.†		51,468		47,253
	15,000	OceanaGold Corp.		50,106		29,456
	7,000	Pretium Resources Inc.†		78,698		77,910
	12,000	Sekisui Plastics Co. Ltd.		136,928		91,666
	20,000	SEMAFO Inc.†		55,436		41,585
	2,000	Sumitomo Bakelite Co. Ltd.		87,393		75,744

					Market
Shares			Cost		Value
	5,000	T. Hasegawa Co. Ltd.	$	97,468	$	98,063
	10,000	Teranga Gold Corp.†		38,044		54,060
	25,000	Westgold Resources Ltd.†		38,443		40,175
		TOTAL MATERIALS		1,073,922		982,127
		INDUSTRIALS — 12.4%
	10,000	Aida Engineering Ltd.		116,191		90,470
	40,000	Chemring Group plc		100,043		127,427
	2,000	Clarkson plc		78,000		80,139
	4,000	Loomis AB, Cl. B		148,615		165,614
	20,000	Rotork plc		68,941		88,749
	2,000	Shima Seiki Manufacturing Ltd.		101,334		46,993
	12,000	Signature Aviation plc		42,061		50,420
	10,000	Sodick Co. Ltd.		123,377		89,642
	13,000	Teraoka Seisakusho Co. Ltd.		100,314		60,062
	6,000	Workspace Group plc, REIT		72,186		94,418
	8,000	Yushin Precision Equipment Co. Ltd.		109,039		74,879
		TOTAL INDUSTRIALS		1,060,101		968,813
		HEALTH CARE — 9.5%
	3,428	AddLife AB, Cl. B		66,615		105,771
	600	Bachem Holding AG, Cl. B		84,777		95,970
	6,000	CVS Group plc		76,399		91,001
	900	Gerresheimer AG		78,165		69,658
	10,000	IRRAS AB†		39,590		24,983
	15,000	Nanosonics Ltd.†		32,031		66,842
	230	Siegfried Holding AG		76,087		111,459
	10,000	Tristel plc		42,363		50,997
	1,300	Vetoquinol SA		81,468		93,909
	250	Ypsomed Holding AG		47,385		33,840
		TOTAL HEALTH CARE		624,880		744,430
		FINANCIALS — 8.9%
	30,000	Brewin Dolphin Holdings plc		141,892		147,985
	4,000	Kinnevik AB, Cl. B		92,113		97,797
	14,000	Polar Capital Holdings plc		85,288		101,995
	4,000	Rothschild & Co.		142,628		114,863
	13,000	Tamburi Investment Partners SpA		90,851		99,450
	120,000	Value Partners Group Ltd.		109,270		73,919
	31,538	XPS Pensions Group plc		76,002		57,232
		TOTAL FINANCIALS		738,044		693,241
		COMMUNICATION SERVICES — 6.9%
	1,100	Akatsuki Inc.		66,733		59,224
	30,000	HT&E Ltd.		55,068		35,684
	9,000	Manchester United plc, Cl. A		159,353		179,370
	548	Millicom International Cellular SA, SDR		24,918		26,246
	4,190	Modern Times Group MTG AB, Cl. B†		66,034		49,946
	4,190	Nordic Entertainment Group AB, Cl. B		92,012		135,456
	1,000	Xilam Animation SA†		45,110		49,804
		TOTAL COMMUNICATION SERVICES		509,228		535,730

See accompanying notes to financial statements.

6

The Gabelli International Small Cap Fund

Schedule of Investments (Continued) — December 31, 2019

Shares		Cost		Market Value
	COMMON STOCKS (Continued)
	INFORMATION TECHNOLOGY — 6.0%
24,285	Equiniti Group plc	$	90,810	$	66,395
10,000	F-Secure OYJ†		49,487		34,156
12,000	Infomart Corp.		69,674		108,785
20,000	NCC Group plc		57,230		59,740
35,000	Oxford Metrics plc		34,515		49,143
3,000	PSI Software AG		67,275		69,994
6,000	Topcon Corp.		108,068		78,579
	TOTAL INFORMATION TECHNOLOGY		477,059		466,792
	REAL ESTATE — 4.0%
25,000	Impact Healthcare Reit plc, REIT		34,145		35,764
4,000	PATRIZIA AG		88,694		89,108
7,000	Tosei Corp.		70,534		96,121
500	Warehouses De Pauw CVA, REIT		56,435		90,970
	TOTAL REAL ESTATE		249,808		311,963
	UTILITIES — 0.2%
75,000	China Everbright Water Ltd.		27,144		17,845
	TOTAL COMMON STOCKS		7,417,924		7,573,359
	PREFERRED STOCKS — 1.1%
	Health Care — 1.1%
1,400	Draegerwerk AG & Co. KGaA, 0.190%		123,037		87,471
	RIGHTS — 0.0%
	Materials — 0.0%
6,250	Castile Resources Pty Ltd., expire 01/10/20†(a)		0		0

Principal Amount		Cost		Market Value
	U.S. GOVERNMENT OBLIGATIONS — 3.1%
$  240,000	U.S. Treasury Bills, 1.529% to 1.543%††, 03/12/20	$	239,275	$	239,301
	TOTAL INVESTMENTS — 101.3%	$	7,780,236		7,900,131
	Other Assets and Liabilities (Net) — (1.3)%				(104,827	)
	NET ASSETS — 100.0%			$	7,795,304

(a) Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

† Non-income producing security.

†† Represents annualized yields at dates of purchase.

REIT Real Estate Investment Trust

SDR Swedish Depositary Receipt

Geographic Diversification	% of Market Value			Market Value
Europe		58.9	%		$	4,651,108
Japan		23.3				1,842,580
Canada		6.7				527,619
Latin America		4.2				330,103
Asia/Pacific		3.9				309,420
United States		3.0				239,301
		100.0	%		$	7,900,131

See accompanying notes to financial statements.

7

The Gabelli International Small Cap Fund

Statement of Assets and Liabilities

December 31, 2019

Assets:
Investments, at value (cost $7,780,236)	$	7,900,131
Foreign currency, at value (cost $5)		5
Receivable for Fund shares sold		2,204
Receivable from Adviser		22,851
Dividends receivable		22,731
Prepaid expenses		14,654
Total Assets		7,962,576
Liabilities:
Payable to custodian		87,347
Payable for investment advisory fees		12,899
Payable for distribution fees		1,393
Payable for shareholder communications expenses		12,113
Payable for shareholder services fees		4,627
Payable for legal and audit fees		29,999
Other accrued expenses		18,894
Total Liabilities		167,272
Net Assets (applicable to 594,355 shares outstanding)	$	7,795,304
Net Assets Consist of:
Paid-in capital	$	7,685,886
Total distributable earnings		109,418
Net Assets	$	7,795,304
Shares of Capital Stock, each at $0.001 par value:
Class AAA:
Net Asset Value, offering, and redemption price per share ($6,365,710 ÷ 487,240 shares outstanding; 75,000,000 shares authorized)		$13.06
Class A:
Net Asset Value and redemption price per share ($91,199 ÷ 6,997 shares outstanding; 50,000,000 shares authorized)		$13.03
Maximum offering price per share (NAV ÷ 0.9425, based on maximum sales charge of 5.75% of the offering price)		$13.82
Class C:
Net Asset Value and offering price per share ($26,664 ÷ 2,271 shares outstanding; 25,000,000 shares authorized)		$11.74	(a)
Class I:
Net Asset Value, offering, and redemption price per share ($1,311,731 ÷ 97,847 shares outstanding; 25,000,000 shares authorized).		$13.41

(a) Redemption price varies based on the length of time held.

Statement of Operations

For the Year Ended December 31, 2019

Investment Income:
Dividends (net of foreign withholding taxes of $15,274)	$	165,923
Income fromnon-cash dividends		24,063
Interest		5,393
Total Investment Income		195,379
Expenses:
Investment advisory fees		78,209
Distribution fees - Class AAA		15,790
Distribution fees - Class A		211
Distribution fees - Class C		280
Legal and audit fees		35,451
Registration expenses		30,377
Shareholder communications expenses		28,758
Shareholder services fees		20,194
Custodian fees		6,080
Directors’ fees		2,008
Interest expense		297
Miscellaneous expenses		45,739
Total Expenses		263,394
Less:
Expenses reimbursements (See Note 3)		(184,323	)
Net Expenses		79,071
Net Investment Income		116,308
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency:
Net realized gain on investments		380,404
Net realized loss on foreign currency transactions		(505	)
Net realized gain on investments and foreign currency transactions		379,899
Net change in unrealized appreciation/depreciation: on investments		1,293,762
on foreign currency translations		176
Net change in unrealized appreciation/depreciation on investments and foreign currency translations		1,293,938
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency		1,673,837
Net Increase in Net Assets Resulting from Operations	$	1,790,145

See accompanying notes to financial statements.

8

The Gabelli International Small Cap Fund

Statement of Changes in Net Assets

	Year Ended December 31, 2019				Year Ended December 31, 2018
Operations:
Net investment income		$	116,308			$	103,452
Net realized gain on investments and foreign currency transactions			379,899				1,754,851
Net change in unrealized appreciation/depreciation on investments and foreign currency translations			1,293,938				(3,980,491	)
Net Increase/(Decrease) in Net Assets Resulting from Operations			1,790,145				(2,122,188	)
Distributions to Shareholders:
Accumulated earnings
Class AAA			(413,625	)			(1,452,994	)
Class A			(5,111	)			(19,971	)
Class C			(1,466	)			(7,638	)
Class I			(84,650	)			(364,355	)
			(504,852	)			(1,844,958	)
Return of Capital
Class AAA			—				(2,742	)
Class I			—				(666	)
			—				(3,408	)
Total Distributions to Shareholders			(504,852	)			(1,848,366	)
Capital Share Transactions:
Class AAA			(627,085	)			484,686
Class A			(3,385	)			(31,025	)
Class C			(8,781	)			3,490
Class I			(474,101	)			307,596
Net Increase/(Decrease) in Net Assets from Capital Share Transactions			(1,113,352	)			764,747
Redemption Fees			109				803
Net Increase/(Decrease) in Net Assets			172,050				(3,205,004	)
Net Assets:
Beginning of year			7,623,254				10,828,258
End of year		$	7,795,304			$	7,623,254

See accompanying notes to financial statements.

9

The Gabelli International Small Cap Fund

Financial Highlights

Selected data for a share of capital stock outstanding throughout each year:

				Income (Loss) from Investment Operations												Distributions																									Ratios to Average Net Assets/ Supplemental Data
Year Ended December 31	Net Asset Value, Beginning of Year			Net Investment Income (Loss)(a)				Net Realized and Unrealized Gain (Loss) on Investments				Total from Investment Operations				Net Investment Income				Net Realized Gain				Return of Capital				Total Distributions				Redemption Fees(a)(b)			Net Asset Value, End of Year			Total Return†			Net Assets End of Year (in 000’s)			Net Investment Income (Loss)			Operating Expenses Before Reimburse- ment			Operating Expenses Net of Reimburse- ment(c)(d)			Portfolio Turnover Rate
Class AAA
2019		$	11.09		$	0.19	(e)		$	2.68			$	2.87			$	(0.22	)		$	(0.68	)			—			$	(0.90	)		$	0.00		$	13.06		25.9	%		$	6,366		1.50	%(e)		3.41	%		1.00	%		9	%
2018			18.55			0.19				(4.13	)			(3.94	)			(0.19	)			(3.32	)		$	(0.01	)			(3.52	)			0.00			11.09		(20.9	)			5,954		1.07			3.11			1.00	(f)		26
2017			22.41			0.04				6.19				6.23				(0.13	)			(9.96	)			—				(10.09	)			—			18.55		28.1				8,599		0.16			3.01			1.67			71
2016			23.45			0.27				(0.02	)			0.25				(0.28	)			(1.01	)			—				(1.29	)			0.00			22.41		1.1				7,764		1.14			2.80			1.38	(g)(h)		4
2015			23.71			0.01				0.05				0.06				(0.11	)			(0.21	)			—				(0.32	)			0.00			23.45		0.2				8,596		0.03			2.67			2.02	(f)(g)		7
Class A
2019		$	11.05		$	0.07	(e)		$	2.67			$	2.74			$	(0.08	)		$	(0.68	)			—			$	(0.76	)		$	0.00		$	13.03		24.9	%		$	91		0.60	%(e)		3.41	%		1.91	%		9	%
2018			18.44			0.01				(4.08	)			(4.07	)			—				(3.32	)			—				(3.32	)			0.00			11.05		(21.7	)			81		0.04			3.11			2.01	(f)		26
2017			22.33			(0.05	)			6.18				6.13				(0.06	)			(9.96	)			—				(10.02	)			—			18.44		27.7				155		(0.19	)		3.01			2.00			71
2016			23.35			0.27				(0.01	)			0.26				(0.27	)			(1.01	)			—				(1.28	)			0.00			22.33		1.1				166		1.14			2.80			1.39	(g)(h)		4
2015			23.61			0.02				0.03				0.05				(0.10	)			(0.21	)			—				(0.31	)			0.00			23.35		0.1				183		0.08			2.67			2.02	(f)(g)		7
Class C
2019		$	10.02		$	(0.01	)(e)		$	2.41			$	2.40				—			$	(0.68	)			—			$	(0.68	)		$	0.00		$	11.74		24.0	%		$	26		(0.12	)%(e)		4.16	%		2.61	%		9	%
2018			17.26			(0.11	)			(3.81	)			(3.92	)			—				(3.32	)			—				(3.32	)			0.00			10.02		(22.3	)			31		(0.67	)		3.86			2.76	(f)		26
2017			21.52			(0.23	)			5.93				5.70				—				(9.96	)			—				(9.96	)			—			17.26		26.8				43		(0.92	)		3.76			2.75			71
2016			22.60			0.20				(0.01	)			0.19			$	(0.26	)			(1.01	)			—				(1.27	)			0.00			21.52		0.9				39		0.87			3.55			1.66	(g)(h)		4
2015			22.94			(0.17	)			0.04				(0.13	)			—				(0.21	)			—				(0.21	)			0.00			22.60		0.6				51		(0.75	)		3.42			2.77	(f)(g)		7
Class I
2019		$	11.39		$	0.19	(e)		$	2.77			$	2.96			$	(0.26	)		$	(0.68	)			—			$	(0.94	)		$	0.00		$	13.41		26.0	%		$	1,312		1.52	%(e)		3.16	%		1.00	%		9	%
2018			18.93			0.19				(4.22	)			(4.03	)			(0.18	)			(3.32	)		$	(0.01	)			(3.51	)			0.00			11.39		(20.9	)			1,557		1.07			2.86			1.00	(f)		26
2017			22.68			0.21				6.31				6.52				(0.31	)			(9.96	)			—				(10.27	)			—			18.93		29.0				2,031		0.82			2.76			1.00			71
2016			23.71			0.36				(0.01	)			0.35				(0.37	)			(1.01	)			—				(1.38	)			0.00			22.68		1.5				1,246		1.50			2.55			1.01	(g)(h)		4
2015			23.87			0.21				0.08				0.29				(0.24	)			(0.21	)			—				(0.45	)			0.00			23.71		1.2				1,251		0.88			2.42			1.02	(f)(g)		7

   † Total return represents aggregate total return of a hypothetical $1,000 investment at the beginning of the year and sold at the end of the year including reinvestment of distributions and does not reflect the applicable sales charges.

(a) Per share amounts have been calculated using the average shares outstanding method.

(b) Amount represents less than $0.005 per share.

(c) Under an expense reimbursement agreement with the Adviser, the Adviser reimbursed expenses of $184,323, $201,091, $144,403, $137,877, and $75,568 for the years ended December 31, 2019, 2018, 2017, 2016, and 2015, respectively.

(d) The Fund incurred interest expense. For the year ended December 31, 2018, if interest expense had not been incurred, the ratio of operating expenses to average net assets would have been 2.00% (Class A), 2.75% (Class C) and with no impact to Class AAA and Class I. For the years ended December 31, 2019, 2017, 2016, and 2015, the effect of interest expense was minimal.

(e) Includes income resulting from special dividends. Without these dividends, the per share income amounts would have been 0.15 (Class AAA), 0.04 (Class A), (0.05) (Class C), and 0.15 (Class I), and the net investment income ratio would have been 1.19% (Class AAA), 0.29% (Class A), (0.43%) (Class C), and 1.21% (Class I), respectively.

(f) The Fund received credits from a designated broker who agreed to pay certain Fund operating expenses. For the year ended December 31, 2015, had such payments not been made, the expense ratios would have been 2.03% (Class AAA and Class A), 2.78% (Class C), and 1.03% (Class I). For the year ended December 31, 2018, the effect of expense was minimal.

(g) The Fund incurred tax expense for the years ended December 31, 2016 and 2015. If tax expense had not been incurred, the ratios of operating expenses to average net assets would have been 1.37% and 2.00% (Class AAA), 1.38% and 2.00% (Class A), 1.65% and 2.75% (Class C), and 1.00% and 1.00% (Class I), respectively.

(h) During the year ended December 31, 2016, the Fund received reimbursements of custody expenses paid in prior years. Had such reimbursement (allocated by relative net asset values of the Fund’s share classes) been included in this period, the expense ratios would have been 1.17% (Class AAA),1.18% (Class A), 1.45% (Class C), and 0.80% (Class I).

See accompanying notes to financial statements.

10

The Gabelli International Small Cap Fund

Notes to Financial Statements

1. Organization.The Gabelli International Small Cap Fund, a series of GAMCO Global Series Funds, Inc. (theCorporation), was incorporated on July 16, 1993 in Maryland. The Fund is anon-diversifiedopen-end management investment company registered under the Investment Company Act of 1940, as amended (the 1940 Act), and is one of five separately managed portfolios (collectively, the Portfolios) of the Corporation. The Fund’s primary objective is capital appreciation. The Fund commenced investment operations on May 11, 1998.

2. Significant Accounting Policies.As an investment company, the Fund follows the investment companyaccounting and reporting guidance, which is part of U.S. generally accepted accounting principles (GAAP) that may require the use of management estimates and assumptions in the preparation of its financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

New Accounting Pronouncements.To improve the effectiveness of fair value disclosure requirements, theFinancial Accounting Standards Board recently issued Accounting Standard Update (ASU)2018-13, Fair Value Measurement Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU2018-13), which adds, removes, and modifies certain aspects relating to fair value disclosure. ASU2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption of the additions relating to ASU2018-13 is not required, even if early adoption is elected for the removals and modifications under ASU2018-13. Management has early adopted the removals and modifications set forth in ASU2018-13 in these financial statements and has not early adopted the additions set forth in ASU2018-13.

Security Valuation.Portfolio securities listed or traded on a nationally recognized securities exchange or tradedin the U.S.over-the-counter market for which market quotations are readily available are valued at the last quoted sale price or a market’s official closing price as of the close of business on the day the securities are being valued. If there were no sales that day, the security is valued at the average of the closing bid and asked prices or, if there were no asked prices quoted on that day, then the security is valued at the closing bid price on that day. If no bid or asked prices are quoted on such day, the security is valued at the most recently available price or, if the Board of Directors (the Board) so determines, by such other method as the Board shall determine in good faith to reflect its fair market value. Portfolio securities traded on more than one national securities exchange or market are valued according to the broadest and most representative market, as determined by Gabelli Funds, LLC (the Adviser).

Portfolio securities primarily traded on a foreign market are generally valued at the preceding closing values of such securities on the relevant market, but may be fair valued pursuant to procedures established by the Board if market conditions change significantly after the close of the foreign market, but prior to the close of business on the day the securities are being valued. Debt obligations for which market quotations are readily available are valued at the average of the latest bid and asked prices. If there were no asked prices quoted on such day, the security is valued using the closing bid price. Such debt obligations are valued through prices provided by a pricing service approved by the Board. Certain securities are valued principally using dealer quotations.

Securities and assets for which market quotations are not readily available are fair valued as determined by the Board. Fair valuation methodologies and procedures may include, but are not limited to: analysis and review of available financial andnon-financial information about the company; comparisons with the valuation and changes in valuation of similar securities, including a comparison of foreign securities with the equivalent U.S.

11

The Gabelli International Small Cap Fund

Notes to Financial Statements (Continued)

dollar value American Depositary Receipt securities at the close of the U.S. exchange; and evaluation of any other information that could be indicative of the value of the security.

The Fund employs a fair value model to adjust prices to reflect events affecting the values of certain portfolio securities which occur between the close of trading on the principal market for such securities (foreign exchanges andover-the-counter markets) at the time when net asset values of the Fund are determined. If the Fund’s valuation committee believes that a particular event would materially affect net asset value, further adjustment is considered.

The inputs and valuation techniques used to measure fair value of the Fund’s investments are summarized into three levels as described in the hierarchy below:

●    Level 1 — quoted prices in active markets for identical securities;

●    Level 2 — other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.); and

●    Level 3 —  significant unobservable inputs (including the Board’s determinations as to the fair value of investments).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input both individually and in the aggregate that is significant to the fair value measurement. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. If fair value is adjusted from the local close, such securities are classified as Level 2 in the fair value hierarchy presented below. The summary of the Fund’s investments in securities by inputs used to value the Fund’s investments as of December 31, 2019 is as follows:

	Valuation Inputs						Total Market Value at 12/31/19
	Level 1 Quoted Prices		Level 2 Other Significant Observable Inputs		Level 3 Significant Unobservable Inputs
INVESTMENTS IN SECURITIES:
ASSETS (Market Value):
Common Stocks
Materials		$   982,127		—		$  0		$   982,127
Other Industries(a)		6,591,232		—		—		6,591,232
Total Common Stocks		7,573,359		—		0		7,573,359
Preferred Stocks (a)		87,471		—		—		87,471
Rights (a)		—		—		0		0
U.S. Government Obligations		—		$239,301		—		239,301
TOTAL INVESTMENTS IN SECURITIES – ASSETS		$7,660,830		$239,301		$  0		$7,900,131

(a) Please refer to the Schedule of Investments for the industry classifications of these portfolio holdings.

The Fund did not have any transfers into or out of Level 3 during the year ended December 31, 2019.

Additional Information to Evaluate Qualitative Information.

General.The Fund uses recognized industry pricing services – approved by the Board and unaffiliated withthe Adviser – to value most of its securities, and uses broker quotes provided by market makers of securities not valued by these and other recognized pricing sources. Several different pricing feeds are received to value domestic equity securities, international equity securities, preferred equity securities, and fixed income securities. The data within these feeds are ultimately sourced from major stock exchanges and trading systems where

12

The Gabelli International Small Cap Fund

Notes to Financial Statements (Continued)

these securities trade. The prices supplied by external sources are checked by obtaining quotations or actual transaction prices from market participants. If a price obtained from the pricing source is deemed unreliable, prices will be sought from another pricing service or from a broker/dealer that trades that security or similar securities.

Fair Valuation.Fair valued securities may be common or preferred equities, warrants, options, rights, or fixedincome obligations. Where appropriate, Level 3 securities are those for which market quotations are not available, such as securities not traded for several days, or for which current bids are not available, or which are restricted as to transfer. When fair valuing a security, factors to consider include recent prices of comparable securities that are publicly traded, reliable prices of securities not publicly traded, the use of valuation models, current analyst reports, valuing the income or cash flow of the issuer, or cost if the preceding factors do not apply. A significant change in the unobservable inputs could result in a lower or higher value in Level 3 securities. The circumstances of Level 3 securities are frequently monitored to determine if fair valuation measures continue to apply.

The Adviser reports quarterly to the Board the results of the application of fair valuation policies and procedures. These may include backtesting the prices realized in subsequent trades of these fair valued securities to fair values previously recognized.

Foreign Currency Translations.The books and records of the Fund are maintained in U.S. dollars. Foreigncurrencies, investments, and other assets and liabilities are translated into U.S. dollars at current exchange rates. Purchases and sales of investment securities, income, and expenses are translated at the exchange rate prevailing on the respective dates of such transactions. Unrealized gains and losses that result from changes in foreign exchange rates and/or changes in market prices of securities have been included in unrealized appreciation/depreciation on investments and foreign currency translations. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of interest and dividends recorded on the books of the Fund and the amounts actually received. The portion of foreign currency gains and losses related to fluctuation in exchange rates between the initial purchase trade date and subsequent sale trade date is included in realized gain/(loss) on investments.

Foreign Securities.The Fund may directly purchase securities of foreign issuers. Investing in securities offoreign issuers involves special risks not typically associated with investing in securities of U.S. issuers. The risks include possible revaluation of currencies, the inability to repatriate funds, less complete financial information about companies, and possible future adverse political and economic developments. Moreover, securities of many foreign issuers and their markets may be less liquid and their prices more volatile than securities of comparable U.S. issuers.

Foreign Taxes.The Fund may be subject to foreign taxes on income, gains on investments, or currency repatriation,a portion of which may be recoverable. The Fund will accrue such taxes and recoveries as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Investments in other Investment Companies.The Fund may invest, from time to time, in shares of otherinvestment companies (or entities that would be considered investment companies but are excluded from the definition pursuant to certain exceptions under the 1940 Act) (the Acquired Funds) in accordance with the 1940

13

The Gabelli International Small Cap Fund

Notes to Financial Statements (Continued)

Act and related rules. Shareholders in the Fund would bear the pro rata portion on of the periodic expenses of the Acquired Funds in addition to the Fund’s expenses. For the year ended December 31, 2019, the Fund’s pro rata portion of the periodic expenses charged by the Acquired Funds was less than one basis point.

Securities Transactions and Investment Income.Securities transactions are accounted for on the trade datewith realized gain or loss on investments determined by using the identified cost method. Interest income (including amortization of premium and accretion of discount) is recorded on an accrual basis. Premiums and discounts on debt securities are amortized using the effective yield to maturity method. Dividend income is recorded on theex-dividend date, except for certain dividends from foreign securities that are recorded as soon after theex-dividend date as the Fund becomes aware of such dividends.

Determination of Net Asset Value and Calculation of Expenses.Certain administrative expenses are commonto, and allocated among, various affiliated funds. Such allocations are made on the basis of each fund’s average net assets or other criteria directly affecting the expenses as determined by the Adviser pursuant to procedures established by the Board.

In calculating the NAV per share of each class, investment income, realized and unrealized gains and losses, redemption fees, and expenses other than class specific expenses are allocated daily to each class of shares based upon the proportion of net assets of each class at the beginning of each day. Distribution expenses are borne solely by the class incurring the expense.

Distributions to Shareholders.Distributions to shareholders are recorded on theex-dividend date. Distributionsto shareholders are based on income and capital gains as determined in accordance with federal income tax regulations, which may differ from income and capital gains as determined under GAAP. These differences are primarily due to differing treatments of income and gains on various investment securities and foreign currency transactions held by the Fund, timing differences, and differing characterizations of distributions made by the Fund. Distributions from net investment income for federal income tax purposes include net realized gains on foreign currency transactions. These book/tax differences are either temporary or permanent in nature. To the extent these differences are permanent, adjustments are made to the appropriate capital accounts in the period when the differences arise. Permanent differences were primarily due to reclasses of realized foreign currency and redesignation of dividends parid. These reclassifications have no impact on the NAV of the Fund. For the year ended December 31, 2019, reclassifications were made to decreasepaid-in capital by $1, with an offsetting adjustment to total distributable earnings.

The tax character of distributions paid during the years ended December 31, 2019 and 2018 was as follows:

	Year Ended December 31, 2019			Year Ended December 31, 2018
Distributions paid from:
Ordinary income (inclusive of short term capital gains)		$	128,707		$	271,040
Net long term capital gains			376,145			1,573,918
Return of capital			—			3,408
Total distributions paid		$	504,852		$	1,848,366

Provision for Income Taxes.The Fund intends to continue to qualify as a regulated investment companyunder Subchapter M of the Internal Revenue Code of 1986, as amended (the Code). It is the policy of the

14

The Gabelli International Small Cap Fund

Notes to Financial Statements (Continued)

Fund to comply with the requirements of the Code applicable to regulated investment companies and to distribute substantially all of its net investment company taxable income and net capital gains. Therefore, no provision for federal income taxes is required.

As of December 31, 2019, the components of accumulated earnings/losses on a tax basis were as follows:

Undistributed ordinary income	$	4,861
Net unrealized appreciation on investments and foreign currency translations		104,557
Total	$	109,418

At December 31, 2019, the temporary differences between book basis and tax basis unrealized appreciation were primarily due tomark-to-market adjustments on investments in passive foreign investment companies.

The following summarizes the tax cost of investments and the related net unrealized depreciation at December 31, 2019:

	Cost			Gross Unrealized Appreciation			Gross Unrealized Depreciation				Net Unrealized Depreciation
Investments		$	7,795,884		$	1,140,906		$	(1,036,659	)		$	104,247

The Fund is required to evaluate tax positions taken or expected to be taken in the course of preparing the Fund’s tax returns to determine whether the tax positions are“more-likely-than-not” of being sustained by the applicable tax authority. Income tax and related interest and penalties would be recognized by the Fund as tax expense in the Statement of Operations if the tax positions were deemed not to meet themore-likely-than-not threshold. During the year ended December 31, 2019, the Fund did not incur any income tax, interest, or penalties. As of December 31, 2019, the Adviser has reviewed all open tax years and concluded that there was no impact to the Fund’s net assets or results of operations. The Fund’s federal and state tax returns for the prior three fiscal years remain open, subject to examination. On an ongoing basis, the Adviser will monitor the Fund’s tax positions to determine if adjustments to this conclusion are necessary.

3. Investment Advisory Agreement and Other Transactions.The Fund has entered into an investmentadvisory agreement (the Advisory Agreement) with the Adviser which provides that the Fund will pay the Adviser a fee, computed daily and paid monthly, at the annual rate of 1.00% of the value of its average daily net assets. In accordance with the Advisory Agreement, the Adviser provides a continuous investment program for the Fund’s portfolio, oversees the administration of all aspects of the Fund’s business and affairs, and pays the compensation of all Officers and Directors of the Fund who are affiliated persons of the Adviser.

Through November 30, 2019, the Adviser had agreed to waive and/or to reimburse expenses of the Fund to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) at no more than 1.00%, 2.00%, 2.75%, and 1.00% of the value of the Fund’s average daily net assets for Class AAA, Class A, Class C, and Class I, respectively. Effective December 1, 2019, the Adviser amended its contractual agreement with respect to each share class of the Fund to waive its investment advisory fees and/or to reimburse expenses to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) until at least April 30, 2021, at no more than 0.90% of the value of the Fund’s average daily net assets for each of share class. During the year ended December 31, 2019, the Adviser reimbursed the Fund in the amount of $184,323. In addition, the

15

The Gabelli International Small Cap Fund

Notes to Financial Statements (Continued)

Fund has agreed, during the two year period following any waiver or reimbursement by the Adviser, to repay such amount to the extent, that after giving effect to the repayment, such adjusted annualized total operating expenses of the Fund would not exceed 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. The arrangement is renewable annually. At December 31, 2019, the cumulative amount which the Fund may repay the Adviser, subject to the terms above, is $385,414:

For the year ended December 31, 2018, expiring December 31, 2020	$	201,091
For the year ended December 31, 2019, expiring December 31, 2021		184,323
	$	385,414

The Corporation pays each Director who is not considered to be an affiliated person an annual retainer of $6,000 plus $1,000 for each Board meeting attended, and they are reimbursed for any out of pocket expenses incurred in attending meetings. All Board committee members receive $1,000 per meeting attended. The Chairman of the Audit Committee receives an annual fee of $3,000 and the Lead Director receives an annual fee of $2,000. A Director may receive a single meeting fee, allocated among the participating funds, for attending certain meetings held on behalf of multiple funds. Directors who are directors or employees of the Adviser or an affiliated company receive no compensation or expense reimbursement from the Corporation.

4. Distribution Plan.The Fund’s Board has adopted a distribution plan (the Plan) for each class of shares,except for Class I Shares, pursuant to Rule12b-1 under the 1940 Act. Under the Class AAA, Class A, and Class C Share Plans, payments are authorized to G.distributors, LLC (the Distributor), an affiliate of the Adviser, at annual rates of 0.25%, 0.25%, and 1.00%, respectively, of the average daily net assets of those classes, the annual limitations under each Plan. Such payments are accrued daily and paid monthly.

5. Portfolio Securities.Purchases and sales of securities during the year ended December 31, 2019, otherthan short term securities and U.S. Government obligations, aggregated $714,817 and $2,197,453, respectively.

6. Transactions with Affiliates and Other Arrangements. During the year ended December 31, 2019, theFund paid brokerage commissions on security trades of $45 to G.research, LLC, an affiliate of the Adviser. Additionally, the Distributor retained a total of $39 from investors representing commissions (sales charges and underwriting fees) on sales and redemptions of Fund shares.

The cost of calculating the Fund’s NAV per share is a Fund expense pursuant to the Advisory Agreement. Under thesub-administration agreement with Bank of New York Mellon, the fees paid include the cost of calculating the Fund’s NAV. The Fund reimburses the Adviser for this service.

7. Line of Credit.The Fund participates in an unsecured line of credit which expires on March 4, 2020 andmay be renewed annually, of up to $75,000,000 under which it may borrow up to 10% of its net assets from the custodian for temporary borrowing purposes. Borrowings under this arrangement bear interest at a floating rate equal to the higher of the overnight Federal Funds rate plus 125 basis points or the 30 day ICE LIBOR plus 125 basis points in effect on that day. This amount, if any, would be included in “Interest expense” in the Statement of Operations. At December 31, 2019, there were no borrowings outstanding under the line of credit.

The average daily amount of borrowings outstanding under the line of credit during the year ended December 31, 2019 was $1,532 with a weighted average interest rate of 3.73%. The maximum amount borrowed at any time during the year ended December 31, 2019 was $236,000.

16

The Gabelli International Small Cap Fund

Notes to Financial Statements (Continued)

8. Capital Stock.The Fund offers four classes of shares – Class AAA Shares, Class A Shares, Class C Shares,and Class I Shares. Class AAA and Class I Shares are offered without a sales charge. Class A Shares are subject to a maximumfront-end sales charge of 5.75%, and Class C Shares are subject to a 1.00% contingent deferred sales charge for one year after purchase.

The Fund imposes a redemption fee of 2.00% on all classes of shares that are redeemed or exchanged on or before the seventh day after the date of a purchase. The redemption fee is deducted from the proceeds otherwise payable to the redeeming shareholders and is retained by the Fund as an increase inpaid-in capital. The redemption fees retained by the Fund during the years ended December 31, 2019 and 2018, if any, can be found in the Statement of Changes in Net Assets under Redemption Fees.

Transactions in shares of capital stock were as follows:

	Year Ended December 31, 2019							Year Ended December 31, 2018
	Shares			Amount				Shares			Amount
Class AAA
Shares sold		15,135			$	188,463			15,566			$	276,589
Shares issued upon reinvestment of distributions		30,728				399,469			130,407				1,416,098
Shares redeemed		(95,721	)			(1,215,017	)		(72,320	)			(1,208,001	)
Net increase/(decrease)		(49,858	)		$	(627,085	)		73,653			$	484,686
Class A
Shares sold		1,468			$	17,835			416			$	6,885
Shares issued upon reinvestment of distributions		299				3,875			1,352				14,624
Shares redeemed		(2,114	)			(25,095	)		(2,810	)			(52,534	)
Net decrease		(347	)		$	(3,385	)		(1,042	)		$	(31,025	)
Class C
Shares sold		333			$	3,675			1,172			$	20,418
Shares issued upon reinvestment of distributions		125				1,466			775				7,606
Shares redeemed		(1,263	)			(13,922	)		(1,398	)			(24,534	)
Net increase/(decrease)		(805	)		$	(8,781	)		549			$	3,490
Class I
Shares sold		17,785			$	227,429			8,610			$	158,571
Shares issued upon reinvestment of distributions		6,346				84,650			32,737				365,021
Shares redeemed		(63,035	)			(786,180	)		(11,872	)			(215,996	)
Net increase/(decrease)		(38,904	)		$	(474,101	)		29,475			$	307,596

9.Indemnifications.The Fund enters into contracts that contain a variety of indemnifications. The Fund’smaximum exposure under these arrangements is unknown. However, the Fund has not had prior claims or losses pursuant to these contracts. Management has reviewed the Fund’s existing contracts and expects the risk of loss to be remote.

10.Subsequent Events.Management has evaluated the impact on the Fund of all subsequent events occurringthrough the date the financial statements were issued and has determined that there were no subsequent events requiring recognition or disclosure in the financial statements.

17

The Gabelli International Small Cap Fund

Report of Independent Registered Public Accounting Firm

To the Shareholders of The Gabelli International Small Cap Fund

and the Board of Directors of GAMCO Global Series Funds, Inc.

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of The Gabelli International Small Cap Fund (the “Fund”) (one of the funds constituting GAMCO Global Series Funds, Inc. (the “Corporation”)), including the schedule of investments, as of December 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund (one of the funds constituting GAMCO Global Series Funds, Inc.) at December 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and its financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Corporation’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Corporation in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Corporation is not required to have, nor were we engaged to perform, an audit of the Corporation’s internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Corporation’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2019, by correspondence with the custodian. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the auditor of one or more Gabelli/GAMCO Funds investment companies since 1992.

Philadelphia, Pennsylvania

February 27, 2020

18

The Gabelli International Small Cap Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited)

During the six months ended December 31, 2019, the Board of Directors of the Corporation approved the continuation of the investment advisory agreement with the Adviser for the Fund on the basis of the recommendation by the directors (the Independent Board Members) who are not interested persons of the Fund. The following paragraphs summarize the material information and factors considered by the Independent Board Members as well as their conclusions relative to such factors.

Nature, Extent, and Quality of Services.The Independent Board Members considered information regardingthe Fund’s portfolio managers, the depth of the analyst pool available to the Adviser and the portfolio manager, the scope of supervisory, administrative, shareholder, and other services supervised or provided by the Adviser, and the absence of significant service problems reported to the Board. The Independent Board Members noted the experience, length of service, and reputation of the Fund’s portfolio manager.

Investment Performance.The Independent Board Members reviewed the short, medium, and long term performanceof the Fund (as of September 30, 2019) against a peer group of seven other comparable funds prepared by the Adviser (the Adviser Peer Group), and against a peer group prepared by Broadridge (the Broadridge Performance Peer Group) consisting of all internationalmulti-cap growth funds, regardless of asset size or primary channel of distribution, as represented by the Lipper International SmallMulti-Cap Growth Index. The Independent Board Members noted that the Fund’s performance was in the fourth quartile for the one, three, and five year periods, as measured against the Adviser Peer Group. Against the Broadridge Performance Peer Group, the Independent Board Members noted that the Fund’s performance was in the fifth quintile for the one and three year periods and the fourth quintile for the five year period.

Profitability.The Independent Board Members reviewed summary data regarding the profitability of the Fundto the Adviser both with a pro rata administrative overhead charge and with a stand alone administrative charge and noted the effect of the expense limitation agreement. The Independent Board Members also noted that a portion of the Fund’s portfolio transactions were executed by an affiliated broker of the Adviser and that another affiliated broker of the Adviser received distribution fees and minor amounts of sales commissions.

Economies of Scale.The Independent Board Members discussed the major elements of the Adviser’s coststructure, the relationship of those elements to potential economies of scale and reviewed data provided by the Adviser.

Sharing of Economies of Scale.The Independent Board Members noted that the investment managementfee schedule for the Fund does not take into account any potential economies of scale that may develop or any losses or diminished profitability to the Adviser in prior years.

Service and Cost Comparisons.The Independent Board Members compared the expense ratios of the investmentmanagement fee, other expenses, and total expenses of the Fund with similar expense ratios of the Adviser Peer Group and a peer group of eight other internationalmulti-cap growth funds selected by Broadridge (the Broadridge Expense Peer Group), and noted that the Adviser’s management fee includes substantially all administrative services of the Fund as well as investment advisory services. The Independent Board Members noted the effect of the expense limitation agreement in place for the Fund. The Independent Board Members noted that the Fund’s total expense ratio after waivers was second highest compared to the Adviser Peer Group, and the second lowest compared to all of the funds included in the Broadridge Expense Peer Group. The Independent Board Members discussed how the Fund’s size was significantly lower than average within both peer groups

19

The Gabelli International Small Cap Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited) (Continued)

and that the Adviser had been waiving substantial portions of its fees in order to make the Fund a more attractive investment, and noted the Adviser’s recent determination to waive fees even further. The Independent Board Members also noted that the advisory fee structure was the same as that in effect for most of the Gabelli funds. The Independent Board Members were presented with, but did not consider to be material to their decision, various information comparing the advisory fee to the fee for other types of accounts managed by the Adviser.

Conclusions.The Independent Board Members concluded that the Fund enjoyed highly experienced portfoliomanagement services, good ancillary services, but did not have a favorable performance record. The Independent Board Members also concluded that the Fund’s expense ratios were reasonable, particularly in light of the Adviser’s commitment to making the Fund more attractive through further expense waivers, and that economies of scale were not a factor in their thinking at this time. The Independent Board Members did not view the potential profitability of ancillary services as material to their decision. On the basis of the foregoing and without assigning particular weight to any single conclusion, the Independent Board Members determined to recommend continuation of the investment advisory agreement to the full Board.

Based on a consideration of all these factors in their totality, the Board Members, including all of the Independent Board Members, determined that the Fund’s advisory fee was fair and reasonable with respect to the quality of services provided and in light of the other factors described above that the Board deemed relevant. Accordingly, the Board Members determined to approve the continuation of the Fund’s Advisory Agreement. The Board Members based their decision on evaluations of all these factors as a whole and did not consider any one factor asall-important or controlling.

20

The Gabelli International Small Cap Fund

Additional Fund Information (Unaudited)

The business and affairs of the Fund are managed under the direction of the Corporation’s Board of Directors. Information pertaining to the Directors and officers of the Fund is set forth below. The Corporation’s Statement of Additional Information includes additional information about the Fund’s Directors and is available without charge, upon request, by calling800-GABELLI(800-422-3554) or by writing to The Gabelli International Small Cap Fund at One Corporate Center, Rye, NY 10580-1422.

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Number of Funds in Fund Complex Overseen by Director	Principal Occupation(s) During Past Five Years	Other Directorships Held by Director3
INTERESTED DIRECTORS4:
Mario J. Gabelli, CFA Director and Chief Investment Officer Age: 77	Since 1993	33	Chairman, Chief Executive Officer, and Chief Investment Officer– Value Portfolios of GAMCO Investors, Inc. and Chief Investment Officer– Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc.; Director/ Trustee or Chief Investment Officer of other registered investment companies within the Gabelli/GAMCO Fund Complex; Chief Executive Officer of GGCP, Inc.; Executive Chairman of Associated Capital Group, Inc.	Director of Morgan Group Holdings, Inc. (holding company) (2001-2019); Chairman of the Board and Chief Executive Officer of LICT Corp. (multimedia and communication services company); Director of CIBL, Inc. (broadcasting and wireless communications); Director of ICTC Group Inc. (communications) (2013-2018)
John D. Gabelli Director Age: 75	Since 1993	12	Senior Vice President of G.research, LLC	—
INDEPENDENT DIRECTORS5:
E. Val Cerutti Director Age: 80	Since 2001	7	Chief Executive Officer of Cerutti Consultants, Inc.	Director of The LGL Group, Inc. (diversified manufacturing)(1990-2009)
Anthony J. Colavita6 Director Age: 84	Since 1993	20	President of the law firm of Anthony J. Colavita, P.C.	—
Werner J. Roeder Director Age: 79	Since 1993	21	Retired physician; Former Vice President of Medical Affairs (Medical Director) of New York Presbyterian/Lawrence Hospital (1999-2014)	—
Anthonie C. van Ekris6 Director Age: 85	Since 1993	23	Chairman and Chief Executive Officer of BALMAC International, Inc. (global import/ export company)	—
Salvatore J. Zizza7 Director Age: 74	Since 2004	31	President of Zizza & Associates Corp. (private holding company); President of Bergen Cove Realty Inc.; Chairman of Harbor Diversified, Inc. (pharmaceuticals) (2009-2018); Chairman of BAM (semiconductor and aerospace manufacturing)(2000-2018); Chairman of Metropolitan Paper Recycling Inc. (recycling) (2005-2014)	Director and Chairman of Trans- Lux Corporation (business services); Director and Chairman of Harbor Diversified Inc. (pharmaceuticals) (2009-2018)

21

The Gabelli International Small Cap Fund

Additional Fund Information (Continued) (Unaudited)

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2		Principal Occupation(s) During Past Five Years
OFFICERS:
Bruce N. Alpert President Age: 68		Since 1993	Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC since 1988; Officer of registered investment companies within the Gabelli/GAMCO Fund Complex; Senior Vice President of GAMCO Investors, Inc. since 2008
John C. Ball Treasurer Age: 43		Since 2017	Treasurer of funds within the Gabelli/GAMCO Fund Complex since 2017; Vice President and Assistant Treasurer of AMG Funds, 2014-2017; Vice President of State Street Corporation, 2007-2014
Agnes Mullady Vice President Age: 61		Since 2006	Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2006; President and Chief Operating Officer of the Fund Division of Gabelli Funds, LLC since 2015; Chief Executive Officer of G.distributors, LLC since 2010; Senior Vice President of GAMCO Investors, Inc. since 2009; Vice President of Gabelli Funds, LLC since 2007; Executive Vice President of Associated Capital Group, Inc. since 2016
Andrea R. Mango Secretary Age: 47		Since 2013	Vice President of GAMCO Investors, Inc. since 2016; Counsel of Gabelli Funds, LLC since 2013; Secretary of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013; Vice President ofclosed-end funds within the Gabelli/GAMCO Fund Complex since 2014
Richard J. Walz Chief Compliance Officer Age: 60		Since 2013	Chief Compliance Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013

¹ Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.

² Each Director will hold office for an indefinite term until the earliest of (i) the next meeting of shareholders, if any, called for the purpose of considering the election orre-election of such Director and until the election and qualification of his or her successor, if any, elected at such meeting, or (ii) the date a Director resigns or retires, or a Director is removed by the Board of Directors or shareholders, in accordance with the Fund’sBy-Laws and Articles of Incorporation. For officers, includes time served in prior officer positions with the Fund. Each officer will hold office for an indefinite term until the date he or she resigns or retires or until his or her successor is elected and qualified.

³ This column includes only directorships of companies required to report to the SEC under the Securities Exchange Act of 1934, as amended, i.e., public companies, or other investment companies registered under the 1940 Act.

⁴ “Interested person” of the Corporation as defined in the 1940 Act. Messrs. Mario J. Gabelli and John D. Gabelli, who are brothers, are each considered an “interested person” because of their affiliation with Gabelli Funds, LLC which acts as the Corporation’s investment adviser.

⁵ Directors who are not interested persons are considered “Independent” Directors.

⁶ Mr. Colavita’s son, Anthony S. Colavita, serves as a director of other funds in the Gabelli/GAMCO Fund Complex. Mr. van Ekris is an independent director of Gabelli International Ltd., Gabelli Fund LDC, GAMA Capital Opportunities Master Ltd., and GAMCO International SICAV, all of which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and, in that event, would be deemed to be under common control with the Fund’s Adviser.

⁷ Mr. Zizza is an independent director of Gabelli International Ltd., which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and in that event would be deemed to be under common control with the Fund’s Adviser. On September 9, 2015, Mr. Zizza entered into a settlement with the SEC to resolve an inquiry relating to an alleged violation regarding the making of false statements or omissions to the accountants of a company concerning a related party transaction. The company in question is not an affiliate of, nor has any connection to, the Fund. Under the terms of the settlement, Mr. Zizza, without admitting or denying the SEC’s findings and allegation, paid $150,000 and agreed to cease and desist committing or causing any future violations of Rule13b2-2 of the Securities Exchange Act of 1934, as amended. The Board has discussed this matter and has determined that it does not disqualify Mr. Zizza from serving as an Independent Director.

22

THE GABELLI INTERNATIONAL SMALL CAP FUND

One Corporate Center

Rye, NY 10580-1422

Portfolio Manager Biography

Caesar M. P. Bryanjoined GAMCO Asset Management in 1994. He is a member of the global investment teamof Gabelli Funds, LLC and portfolio manager of several funds within the Gabelli/GAMCO Fund Complex. Prior to joining Gabelli, Mr. Bryan was a portfolio manager at Lexington Management. He began his investment career at Samuel Montagu Company, the London based merchant bank. Mr. Bryan graduated from the University of Southampton in England with a Bachelor of Law and is a member of the English Bar.

2019 TAX NOTICE TO SHAREHOLDERS(Unaudited)

For the year ended December 31, 2019, the Fund paid to shareholders ordinary income distributions (comprised of net investment income and short term capital gains) totaling $0.2459, $0.1063, $0.0266, and $0.2842 per share for Class AAA, Class A, Class C, and Class I Shares, respectively, and long term capital gains totaling $376,145. For the year ended December 31, 2019, 0.00% of the ordinary income distribution qualifies for the dividends received deduction available to corporations. The Fund designates 100% of the ordinary income distribution as qualified dividend income pursuant to the Jobs and Growth Tax Relief Reconciliation Act of 2003. The Fund designates 2.42% of the ordinary income distribution as qualified interest income pursuant to the Tax Relief, Unemployment Reauthorization, and Job Creation Act of 2010. Also for the year ended December 31, 2019, the Fund passed through foreign tax credits of $0.0193, $0.0193, $0.0193, and $0.0193 per share to Class AAA, Class A, Class C, and Class I Shares, respectively.

U.S. Government Income:

The percentage of the ordinary income distribution paid by the Fund during the year ended December 31, 2019 which was derived from U.S. Treasury securities was 2.13%. Such income is exempt from state and local tax in all states. However, many states, including New York and California, allow a tax exemption for a portion of the income earned only if a mutual fund has invested at least 50% of its assets at the end of each quarter of the Fund’s fiscal year in U.S. Government securities. The Fund did not meet this strict requirement in 2019. The percentage of U.S. Government securities held as of December 31, 2019 was 3.07%. Due to the diversity in state and local tax law, it is recommended that you consult your personal tax adviser as to the applicability of the information provided to your specific situation.

All designations are based on financial information available as of the date of this annual report and, accordingly, are subject to change. For each item, it is the intention of the Fund to designate the maximum amount permitted under the Internal Revenue Code and the regulations thereunder.

We have separated the portfolio manager’s commentary from the financial statements and investment portfolio due to corporate governance regulations stipulated by the Sarbanes-Oxley Act of 2002. We have done this to ensure that the content of the portfolio manager’s commentary is unrestricted. Both the commentary and the financial statements, including the portfolio of investments, will be available on our website at www.gabelli.com.

GAMCO Global Series Funds, Inc.
THE GABELLI INTERNATIONAL SMALL CAP FUND
One Corporate Center
Rye, New York 10580-1422
t   800-GABELLI(800-422-3554)
f  914-921-5118
e  info@gabelli.com
GABELLI.com
Net Asset Value per share available daily by calling800-GABELLI after 7:00 P.M.
BOARD OF DIRECTORS Mario J. Gabelli, CFA Chairman and Chief Executive Officer, GAMCO Investors, Inc. Executive Chairman, Associated Capital Group, Inc. E. Val Cerutti Chief Executive Officer, Cerutti Consultants, Inc. Anthony J. Colavita President, Anthony J. Colavita, P.C. John D. Gabelli Senior Vice President, G.research, LLC Werner J. Roeder Former Medical Director, Lawrence Hospital Anthonie C. van Ekris Chairman, BALMAC International, Inc. Salvatore J. Zizza Chairman, Zizza & Associates Corp.	OFFICERS Bruce N. Alpert President John C. Ball Treasurer Agnes Mullady Vice President Andrea R. Mango Secretary Richard J. Walz Chief Compliance Officer DISTRIBUTOR G.distributors, LLC CUSTODIAN State Street Bank and Trust Company TRANSFER AGENT AND DIVIDEND DISBURSING AGENT DST Asset Manager Solutions, Inc. LEGAL COUNSEL Skadden, Arps, Slate, Meagher & Flom LLP
This report is submitted for the general information of the shareholders of The Gabelli International Small Cap Fund. It is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
GAB403Q419AR

The Gabelli Global Rising Income and Dividend Fund

Annual Report — December 31, 2019

To Our Shareholders,

For the year ended December 31, 2019, the net asset value (NAV) per Class AAA Share of The Gabelli Global Rising Income and Dividend Fund increased 14.4% compared with an increase of 13.7% for the ICE Bank of America Merrill Lynch Global 300 Convertible Index and an increase of 27.7% for the Morgan Stanley Capital International (MSCI) World Index, respectively. Other classes of shares are available. See page 2 for performance information for all classes of shares.

Enclosed are the financial statements, including the schedule of investments, as of December 31, 2019.

Performance Discussion (Unaudited)

The Fund’s investment objective is to provide investors with a high level of total return through a combination of current income and appreciation of capital.

The Fund’s investment strategy is to invest 80% of its net assets in dividend paying securities (such as common and preferred stock) or other income producing securities (such as fixed-income securities and securities that are convertible into common stock). The Fund will primarily invest in common stocks of foreign and domestic issuers that the Fund’s portfolio manager believes are likely to pay dividends and income and have the potential for above average capital appreciation and dividend increases.

The markets made it look easy in 2019. Stocks, bonds, oil and gold, all returned double-digits. Stocks advanced across market cap, geographies and sectors. The MSCI All Country World Index advanced +27%. The U.S. market outperformed developed international markets, which outperformed emerging markets. Large cap outperformed small cap. Growth outperformed value. Technology was a standout in 2019. The S&P 500 Information Technology sector gained +48%, a full 17 percentage points better than the next best sector, being Communication Services, which, surprise, surprise, is mostly technology stocks.

Selected holdings that contributed positively to performance in 2019 were: Sony Corp (8.5% of net assets as of December 31, 2019), is a Japanese multinational conglomerate whose business includes consumer and professional electronics, entertainment and financial services; growth in the company’s music revenue and image sensor businesses increased operating profits; Nestle SA (3.2%), is a multinational packaged food company that manufactures and markets a wide range of food products. High margins and a solid balance sheet increased performance; and Landis+Gyr Group AG (2.3%), the company manufactures meters and related software for electricity and gas utilities. The company’s net revenues were up year over year.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (www.gabelli.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. To elect to receive all future reports on paper free of charge, please contact your financial intermediary, or, if you invest directly with the Fund, you may call800-422-3554 or send an email request to info@gabelli.com.

Some of our weaker performing securities were: Millicom International Cellular SA (2.8%), is an international telecommunications and media company offering a wide range of digital services to more than 51 million customers in eleven markets in Africa and Latin America. The company declined due to preliminary talks by Liberty Latin America to acquire Millicom falling through in early 2019; CHR Hansen Holdings A/S (1.2%), develops and produces natural ingredients such as cultures, enzymes, probiotics, and natural colors. Lackluster growth and weaker demands across all its end market segments; and Jardine Strategic Holdings Ltd. (1.0%), is an investment holding company that engages in the business of engineering and construction, transport services, insurance broking, luxury hotels, and financial services. The Group’s profit decreased across most of the businesses due to weaker consumer sentiment.

Thank you for your investment in the Gabelli Global Rising Income and Dividend Fund.

We appreciate your confidence and trust.

Comparative Results

Average Annual Returns through December 31, 2019 (a) (Unaudited)
	1 Year			5 Year			10 Year			15 Year			Since Inception (2/3/94)
Class AAA (GAGCX)		14.38	%		4.74	%		5.20	%		3.31	%		4.54	%
ICE Bank of America Merrill Lynch Global 300 Convertible Index		13.74			7.54			8.07			6.76			N/A	(b)
MSCI World Index		27.67			8.74			9.47			6.92			7.06	(c)
Lipper Convertible Securities Fund Average		23.85			7.33			8.75			6.98			7.69
Class A (GAGAX)		14.35			4.70			5.19			3.32			4.56
With sales charge (d)		7.77			3.47			4.57			2.91			4.32
Class C (GACCX)		13.61			3.93			4.05			2.29			3.87
With contingent deferred sales charge (e)		12.61			3.93			4.05			2.29			3.87
Class I (GAGIX)		15.11			5.23			5.56			3.60			4.71

In the current prospectuses dated April 30, 2019, as amended by the supplement dated December 3, 2019, the gross expense ratios for Class AAA, A, C, and I Shares are 1.67%, 1.67%, 2.42%, and 1.42%, respectively, and the net expense ratio for all share classes after contractual reimbursements by Gabelli Funds, LLC, (the “Adviser”) is 0.90%. See page 11 for the expense ratios for the year ended December 31, 2019. The contractual reimbursements are in effect through April 30, 2021. Class AAA and Class I Shares do not have a sales charge. The maximum sales charge for Class A Shares and Class C Shares is 5.75% and 1.00%, respectively.

(a) Returns represent past performance and do not guarantee future results. Total returns and average annual returns reflect changes in share price, reinvestment of distributions, and are net of expenses. Investment returns and the principal value of an investment will fluctuate. When shares are redeemed, they may be worth more or less than their original cost. Current performance may be lower or higher than the performance data presented. Visit www.gabelli.com for performance information as of the most recent month end. Returns would have been lower had the Adviser not reimbursed certain expenses of the Fund. The Fund imposes a 2% redemption fee on shares sold or exchanged within seven days after the date of purchase. Investors should carefully consider the investment objectives, risks, charges, and expenses of the Fund before investing. The prospectuses contain information about these and other matters and should be read carefully before investing. To obtain a prospectus, please visit our website at www.gabelli.com. Investing in foreign securities involves risks not ordinarily associated with investments in domestic issues, including currency fluctuation, economic, and political risks. The Class AAA Share NAVs are used to calculate performance for the periods prior to the issuance of Class A Shares, Class C Shares, and Class I Shares on May 2, 2001, November 26, 2001, and January 11, 2008, respectively. The actual performance of the Class A Shares and Class C Shares would have been lower due to the additional fees and expenses associated with these classes of shares. The actual performance of the Class I Shares would have been higher due to lower expenses related to this class of shares. The ICE Bank of America Merrill Lynch Global 300 Convertible Index is an unmanaged global convertible index composed of companies representative of the market structure of countries in North America, Europe, and the Asia/Pacific region. The MSCI World Index is a free float adjusted market capitalization weighted index that is designed to measure the equity market performance of developed markets. The Lipper Convertible Securities Fund Average reflects the average performance of mutual funds classified in this particular category. Dividends are considered reinvested. You cannot invest directly in an index.

(b) There are no data available for the ICE Bank of America Merrill Lynch Global 300 Convertible Index prior to December 31, 1994.

(c) MSCI World Index since inception performance is as of January 31, 1994.

(d) Performance results include the effect of the maximum 5.75% sales charge at the beginning of the period.

(e) Assuming payment of the 1% maximum contingent deferred sales charge imposed on redemptions made within one year of purchase.

2

COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN

THE GABELLI GLOBAL RISING INCOME AND DIVIDEND FUND (CLASS AAA SHARES),

LIPPER CONVERTIBLE SECURITIES FUND AVERAGE, AND MSCI WORLD INDEX (Unaudited)

* Past performance is not predictive of future results. The performance tables and graph do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares.

3

The Gabelli Global Rising Income and Dividend Fund
Disclosure of Fund Expenses (Unaudited)
For the Six Month Period from July 1, 2019 through December 31, 2019	Expense Table

We believe it is important for you to understand the impact of fees and expenses regarding your investment. All mutual funds have operating expenses. As a shareholder of a fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund’s gross income, directly reduce the investment return of a fund. When a fund’s expenses are expressed as a percentage of its average net assets, this figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your Fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The Expense Table below illustrates your Fund’s costs in two ways:

Actual Fund Return:This section provides informationabout actual account values and actual expenses. You may use this section to help you to estimate the actual expenses that you paid over the period after any fee waivers and expense reimbursements. The “Ending Account Value” shown is derived from the Fund’sactualreturn during the past six months, and the“Expenses Paid During Period” shows the dollar amount that would have been paid by an investor who started with $1,000 in the Fund. You may use this information, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your Fund under the heading “Expenses Paid During Period” to estimate the expenses you paid during this period.

Hypothetical 5% Return:This section providesinformation about hypothetical account values and

hypothetical expenses based on the Fund’s actual expense ratio. It assumes a hypothetical annualized return of 5% before expenses during the period shown. In this case – because the hypothetical return used isnot the Fund’s actual return – the results do not apply to your investment and you cannot use the hypothetical account value and expense to estimate the actual ending account balance or expenses you paid for the period. This example is useful in making comparisons of the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs such as sales charges (loads), redemption fees, or exchange fees, if any, which are described in the Prospectus. If these costs were applied to your account, your costs would be higher. Therefore, the 5% hypothetical return is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. The “Annualized Expense Ratio” represents the actual expenses for the last six months and may be different from the expense ratio in the Financial Highlights which is for the year ended December 31, 2019.

	Beginning Account Value 07/01/19	Ending Account Value 12/31/19		Annualized Expense Ratio		Expenses Paid During Period*
The Gabelli Global Rising Income and Dividend Fund
Actual Fund Return
Class AAA	$1,000.00		$1,040.60		1.58%		$  8.13
Class A	$1,000.00		$1,040.50		1.60%		$  8.23
Class C	$1,000.00		$1,037.40		2.24%		$11.50
Class I	$1,000.00		$1,043.50		0.98%		$  5.05
Hypothetical 5% Return
Class AAA	$1,000.00		$1,017.24		1.58%		$  8.03
Class A	$1,000.00		$1,017.14		1.60%		$  8.13
Class C	$1,000.00		$1,013.91		2.24%		$11.37
Class I	$1,000.00		$1,020.27		0.98%		$  4.99

* Expenses are equal to the Fund’s annualized expense ratio for the last six months multiplied by the average account value over the period, multiplied by the number of days in the most recent fiscal half year (184 days), then divided by 365.

4

Summary of Portfolio Holdings (Unaudited)

The following table presents portfolio holdings as a percent of net assets as of December 31, 2019:

The Gabelli Global Rising Income and Dividend Fund

Food and Beverage	19.3	%
Financial Services	10.8	%
Electronics	8.6	%
Diversified Industrial	6.5	%
Consumer Products	5.4	%
Telecommunications	5.1	%
Energy and Utilities	4.7	%
Machinery	3.8	%
Entertainment	3.6	%
Health Care	3.2	%
U.S. Government Obligations	2.9	%
Wireless Communications	2.8	%
Energy and Energy Services	2.8	%
Hotels and Gaming	2.6	%
Building and Construction	2.2	%

Cable and Satellite	2.2	%
Automotive: Parts and Accessories	2.1	%
Consumer Services	1.5	%
Aerospace and Defense	1.4	%
Business Services	1.4	%
Equipment and Supplies	1.2	%
Computer Software and Services	1.1	%
Publishing	1.1	%
Specialty Chemicals	1.0	%
Retail	0.9	%
Automotive	0.4	%
Aviation: Parts and Services	0.3	%
Other Assets and Liabilities (Net)	1.1	%
	100.0	%

The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission (the SEC) for the first and third quarters of each fiscal year on FormN-PORT. Shareholders may obtain this information at www.gabelli.com or by calling the Fund at800-GABELLI(800-422-3554). The Fund’s FormN-PORT is available on the SEC’s website at www.sec.gov and may also be reviewed and copied at the SEC’s Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling800-SEC-0330.

Proxy Voting

The Fund files FormN-PX with its complete proxy voting record for the twelve months ended June 30, no later than August 31 of each year. A description of the Fund’s proxy voting policies, procedures, and how the Fund voted proxies relating to portfolio securities is available without charge, upon request, by (i) calling800-GABELLI(800-422-3554); (ii) writing to The Gabelli Funds at One Corporate Center, Rye, NY 10580-1422; or (iii) visiting the SEC’s website at www.sec.gov.

5

The Gabelli Global Rising Income and Dividend Fund

Schedule of Investments — December 31, 2019

Principal Amount			Cost		Market Value
		CONVERTIBLE CORPORATE BONDS — 0.2%
		Energy and Utilities — 0.2%
	$100,000	Chart Industries Inc., 1.000%, 11/15/24(a)	$	100,000	$	131,910
Shares
		COMMON STOCKS — 95.8%
		Aerospace and Defense — 1.4%
	5,000	Aerojet Rocketdyne Holdings Inc.†		49,073		228,300
	1,800	L3Harris Technologies Inc.		142,102		356,166
	6,000	Ultra Electronics Holdings plc		125,298		168,013
				316,473		752,479
		Automotive — 0.4%
	1,000	Volkswagen AG		167,644		194,335
		Automotive: Parts and Accessories — 2.1%
	19,000	Dana Inc.		321,675		345,800
	2,000	Genuine Parts Co.		179,604		212,460
	3,000	Linamar Corp.		132,977		113,504
	46,000	Uni-Select Inc.		744,264		403,481
	4,000	Veoneer Inc.†		166,140		62,480
				1,544,660		1,137,725
		Aviation: Parts and Services — 0.3%
	200	Curtiss-Wright Corp.		17,951		28,178
	32,000	Signature Aviation plc		165,734		134,453
				183,685		162,631
		Building and Construction — 2.2%
	333	Arcosa Inc.		7,045		14,835
	15,000	Armstrong Flooring Inc.†		256,062		64,050
	500	Chofu Seisakusho Co. Ltd.		11,059		11,339
	14,000	GCP Applied Technologies Inc.†		359,551		317,940
	10,000	Herc Holdings Inc.†		330,599		489,400
	6,000	Johnson Controls International plc		211,053		244,260
	1,220	Lennar Corp., Cl. B		45,281		54,534
				1,220,650		1,196,358
		Business Services — 1.4%
	14,000	JCDecaux SA		427,423		431,542
	8,000	Matthews International Corp., Cl. A		350,720		305,360
				778,143		736,902
		Cable and Satellite — 2.2%
	514	DISH Network Corp., Cl. A†		19,055		18,232
	800	EchoStar Corp., Cl. A†		33,391		34,648
	1,000	Liberty Global plc, Cl. A†		32,167		22,740
	3,000	Liberty Global plc, Cl. C†		102,756		65,385
	1,000	Liberty Latin America Ltd., Cl. A†		21,774		19,300
	20,000	Rogers Communications Inc., Cl. B		707,828		993,400
				916,971		1,153,705

Shares			Cost		Market Value
		Computer Software and Services — 1.1%
	1,000	AVEVA Group plc	$	32,213	$	61,674
	34,000	Hewlett Packard Enterprise Co.		466,526		539,240
				498,739		600,914
		Consumer Products — 5.4%
	21,000	Essity AB, Cl. A		557,317		675,984
	9,034	Hunter Douglas NV		406,950		587,742
	2,000	L’Oreal SA		335,032		592,260
	1,500	Salvatore Ferragamo SpA		29,710		31,548
	16,000	Scandinavian Tobacco Group A/S		244,046		195,141
	4,500	Svenska Cellulosa AB SCA, Cl. A		29,603		47,996
	10,000	Swedish Match AB		341,330		515,462
	7,000	Unicharm Corp.		139,942		238,369
				2,083,930		2,884,502
		Consumer Services — 1.5%
	12,000	Ashtead Group plc		239,543		383,713
	200	Boyd Group Services Inc.		14,694		31,112
	1,500	Macquarie Infrastructure Corp.		64,095		64,260
	8,500	ServiceMaster Global Holdings Inc.†		300,947		328,610
				619,279		807,695
		Diversified Industrial — 6.5%
	1,000	Aker ASA, Cl. A		61,687		61,907
	8,000	Ampco-Pittsburgh Corp.†		73,770		24,080
	2,500	Ardagh Group SA		33,286		48,950
	8,000	Bouygues SA		332,884		339,921
	500	Crane Co.		37,572		43,190
	17,200	EnPro Industries Inc.		1,201,917		1,150,336
	7,500	Jardine Matheson Holdings Ltd.		400,456		417,000
	17,000	Jardine Strategic Holdings Ltd.		580,912		521,050
	14,500	Myers Industries Inc.		224,775		241,860
	11,500	Nilfisk Holding A/S†		193,613		251,687
	800	Park-Ohio Holdings Corp.		24,932		26,920
	1,000	Sulzer AG		108,207		111,593
	4,000	Textron Inc.		156,075		178,400
	3,000	Trinity Industries Inc.		57,151		66,450
				3,487,237		3,483,344
		Electronics — 8.6%
	36,000	Sony Corp.		999,862		2,452,128
	31,000	Sony Corp., ADR		663,567		2,108,000
	1,500	Stratasys Ltd.†		29,905		30,338
				1,693,334		4,590,466
		Energy and Energy Services — 2.8%
	6,000	BP plc, ADR.		202,748		226,440
	12,000	Landis+Gyr Group AG		731,326		1,248,605
				934,074		1,475,045
		Energy and Utilities — 4.5%
	10,000	Cameco Corp.		102,341		89,000
	500	Cheniere Energy Inc.†		31,425		30,535

See accompanying notes to financial statements.

6

The Gabelli Global Rising Income and Dividend Fund

Schedule of Investments (Continued) — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS (Continued)
		Energy and Utilities (Continued)
	7,500	National Fuel Gas Co.	$	391,149	$	349,050
	16,000	National Grid plc, ADR		1,105,237		1,002,720
	10,000	Royal Dutch Shell plc, Cl. B		227,355		296,646
	20,000	Severn Trent plc		542,019		666,278
	200,000	Texas Competitive Electric Holdings Co. LLC, Escrow†(b)		0		0
				2,399,526		2,434,229
		Entertainment — 3.6%
	9,000	Discovery Inc., Cl. A†		235,500		294,660
	22,000	Grupo Televisa SAB, ADR		426,256		258,060
	28,000	International Game Technology plc		492,079		419,160
	100,000	ITV plc		253,825		200,016
	954	ViacomCBS Inc., Cl. A		50,425		42,806
	7,155	ViacomCBS Inc., Cl. B		337,974		300,295
	15,000	Vivendi SA		371,240		434,436
				2,167,299		1,949,433
		Equipment and Supplies — 1.2%
	4,500	Graco Inc.		100,232		234,000
	12,500	Mueller Industries Inc.		353,268		396,875
				453,500		630,875
		Financial Services — 10.8%
	1,000	American Express Co.		80,155		124,490
	8,800	American International Group Inc.		341,298		451,704
	2,000	Bank of America Corp.		60,160		70,440
	3	Berkshire Hathaway Inc., Cl. A†		358,105		1,018,770
	8,000	Citigroup Inc.		453,300		639,120
	4,000	Comerica Inc.		172,912		287,000
	8,000	Deutsche Bank AG		59,019		62,240
	4,200	EXOR NV		156,204		325,447
	27,000	FinecoBank Banca Fineco SpA		182,261		323,758
	60,000	GAM Holding AG†		388,396		173,838
	2,000	Julius Baer Group Ltd.		98,060		103,182
	17,500	Kinnevik AB, Cl. A		551,565		445,611
	500	Kinnevik AB, Cl. B		15,085		12,225
	3,500	Legg Mason Inc.		94,123		125,685
	5,000	Morgan Stanley		122,102		255,600
	30,000	Resona Holdings Inc.		152,741		132,253
	1,000	State Street Corp.		59,450		79,100
	1,000	T. Rowe Price Group Inc.		71,771		121,840
	10,000	The Bank of New York Mellon Corp.		315,339		503,300
	1,500	The PNC Financial Services Group Inc.		102,907		239,445
	5,000	UBS Group AG		82,880		62,900
	4,000	Wells Fargo & Co.		137,920		215,200
				4,055,753		5,773,148
		Food and Beverage — 19.3%
	2,000	Campbell Soup Co.		68,687		98,840
	8,000	Chr. Hansen Holding A/S		364,041		635,739

Shares			Cost		Market Value
	7,500	Danone SA	$	528,728	$	621,705
	130,000	Davide Campari-Milano SpA		483,830		1,186,988
	6,000	Diageo plc, ADR		665,409		1,010,520
	4,000	Fomento Economico Mexicano SAB de CV, ADR		320,374		378,040
	2,000	Heineken NV		133,144		212,944
	2,500	Kellogg Co.		127,291		172,900
	4,000	Kerry Group plc, Cl. A		300,765		493,550
	10,900	Kikkoman Corp.		350,663		538,705
	5,000	Maple Leaf Foods Inc., Toronto		101,615		99,650
	1,500	McCormick & Co. Inc., Cl. V		133,799		256,605
	1,500	McCormick & Co. Inc.,Non-Voting		106,428		254,595
	800	National Beverage Corp.†		32,665		40,816
	16,000	Nestlé SA		1,149,833		1,732,259
	3,500	Pernod Ricard SA		398,941		625,799
	14,000	Remy Cointreau SA		1,034,431		1,719,574
	6,000	The Kraft Heinz Co.		175,646		192,780
	1,000	Yakult Honsha Co. Ltd.		63,025		55,497
	400,000	Yashili International Holdings Ltd.		130,469		35,933
				6,669,784		10,363,439
		Health Care — 3.2%
	20,000	Achaogen Inc.†		4,200		200
	4,000	Bristol-Myers Squibb Co.		177,668		256,760
	16,000	Clovis Oncology Inc.†		168,002		166,800
	7,000	Cutera Inc.†		137,541		250,670
	1,000	ICU Medical Inc.†		57,679		187,120
	4,000	Idorsia Ltd.†		41,180		123,745
	1,600	Johnson & Johnson		182,234		233,392
	2,500	Patterson Cos. Inc.		68,005		51,200
	6,000	Pfizer Inc.		150,570		235,080
	5,000	Roche Holding AG, ADR		93,345		203,300
				1,080,424		1,708,267
		Hotels and Gaming — 2.6%
	250,000	Mandarin Oriental International Ltd.		408,479		455,000
	180,000	The Hongkong & Shanghai Hotels Ltd.		270,882		192,883
	225,000	William Hill plc		678,144		561,651
	1,500	Wynn Resorts Ltd.		159,493		208,305
				1,516,998		1,417,839
		Machinery — 3.8%
	104,000	CNH Industrial NV, Borsa Italiana		994,865		1,142,075
	50,000	CNH Industrial NV, New York		444,471		550,000
	1,200	Mueller Water Products Inc., Cl. A		13,587		14,376
	2,000	NKT A/S†		39,457		48,275
	28,000	Twin Disc Inc.†		606,230		308,560
				2,098,610		2,063,286
		Publishing — 1.1%
	38,000	The E.W. Scripps Co., Cl. A		680,679		596,980

See accompanying notes to financial statements.

7

The Gabelli Global Rising Income and Dividend Fund

Schedule of Investments (Continued) — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS (Continued)
		Retail — 0.9%
	6,753	Hertz Global Holdings Inc.†	$	79,442	$	106,360
	500	Ingles Markets Inc., Cl. A		15,760		23,755
	4,500	J.C. Penney Co. Inc.†		16,032		5,040
	4,000	Macy’s Inc.		82,499		68,000
	2,000	Nathan’s Famous Inc.		123,459		141,760
	2,400	Walgreens Boots Alliance Inc.		146,920		141,504
				464,112		486,419
		Specialty Chemicals — 1.0%
	700	Ashland Global Holdings Inc.		35,829		53,571
	3,000	International Flavors & Fragrances Inc.		312,534		387,060
	200	The Chemours Co.		1,719		3,618
	4,000	Valvoline Inc.		83,077		85,640
				433,159		529,889
		Telecommunications — 5.1%
	2,000	CenturyLink Inc.		24,356		26,420
	11,000	Cincinnati Bell Inc.†		97,920		115,170
	3,000	Deutsche Telekom AG, ADR		53,860		48,870
	4,000	Frontier Communications Corp.†		4,060		3,558
	50,000	Koninklijke KPN NV		139,515		147,560
	60,000	Pharol SGPS SA, ADR†		30,852		5,521
	2,400	Proximus SA		65,242		68,702
	130,000	Sistema PJSC FC, GDR		672,709		633,620
	90,000	Sprint Corp.†		574,200		468,900
	58,000	Telefonica Deutschland Holding AG		317,044		168,112
	60,000	VEON Ltd., ADR		242,602		151,800
	3,000	Verizon Communications Inc.		144,345		184,200
	38,000	Vodafone Group plc, ADR		1,096,592		734,540
				3,463,297		2,756,973
		Wireless Communications — 2.8%
	31,000	Millicom International Cellular SA, SDR		1,906,848		1,484,741
		TOTAL COMMON STOCKS		41,834,808		51,371,619

Principal Amount		Cost		Market Value
	U.S. GOVERNMENT OBLIGATIONS — 2.9%
$1,578,000	U.S. Treasury Bills, 1.487% to 1.555%††, 01/30/20 to 03/26/20	$	1,574,317	$	1,574,413
	TOTAL INVESTMENTS — 98.9%	$	43,509,125		53,077,942
	Other Assets and Liabilities (Net) — 1.1%				572,847
	NET ASSETS — 100.0%			$	53,650,789

(a) Security exempt from registration under Rule 144A of the Securities Act of 1933, as amended. This security may be resold in transactions exempt from registration, normally to qualified institutional buyers.

(b) Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

† Non-income producing security.

†† Represents annualized yields at dates of purchase.

ADR American Depositary Receipt

GDR Global Depositary Receipt

SDR Swedish Depositary Receipt

Geographic Diversification	% of Market Value			Market Value
Europe		46.9	%	$	24,880,460
United States		35.2			18,673,079
Japan		10.4			5,536,291
Canada		3.2			1,730,146
Asia/Pacific		3.1			1,621,866
Latin America		1.2			636,100
		100.0	%	$	53,077,942

See accompanying notes to financial statements.

8

The Gabelli Global Rising Income and Dividend Fund

Statement of Assets and Liabilities
December 31, 2019
Assets:
Investments, at value (cost $43,509,125)	$	53,077,942
Foreign currency, at value (cost $472)		475
Cash		1,912
Receivable for Fund shares sold		857,203
Receivable from Adviser		13,453
Dividends and interest receivable		125,716
Prepaid expenses		23,893
Total Assets		54,100,594
Liabilities:
Payable for Fund shares redeemed		325,327
Payable for investment advisory fees		44,374
Payable for accounting fees		11,250
Payable for distribution fees		2,867
Payable for legal and audit fees		30,999
Payable for shareholder communications expenses		20,903
Payable for custody expenses		5,340
Other accrued expenses		8,745
Total Liabilities		449,805
Net Assets(applicable to 2,056,078 shares outstanding)	$	53,650,789
Net Assets Consist of:
Paid-in capital	$	44,587,213
Total distributable earnings		9,063,576
Net Assets	$	53,650,789
Shares of Capital Stock, each at $0.001 par value:
Class AAA:
Net Asset Value, offering, and redemption price per share ($6,193,638 ÷ 236,581 shares outstanding; 75,000,000 shares authorized)		$26.18
Class A:
Net Asset Value and redemption price per share ($1,441,236 ÷ 54,937 shares outstanding; 50,000,000 shares authorized)		$26.23
Maximum offering price per share (NAV ÷ 0.9425, based on maximum sales charge of 5.75% of the offering price)		$27.83
Class C:
Net Asset Value and offering price per share ($1,835,909 ÷ 83,681 shares outstanding; 25,000,000 shares authorized)		$21.94	(a)
Class I:
Net Asset Value, offering, and redemption price per share ($44,180,006 ÷ 1,680,879 shares outstanding; 25,000,000 shares authorized)		$26.28

(a) Redemption price varies based on the length of time held.

Statement of Operations
For the Year Ended December 31, 2019
Investment Income:
Dividends (net of foreign withholding taxes of $80,171)	$	895,755
Income fromnon-cash dividends		103,325
Interest		10,739
Total Investment Income		1,009,819
Expenses:
Investment advisory fees		505,729
Distribution fees - Class AAA		13,101
Distribution fees - Class A		3,787
Distribution fees - Class C		19,037
Shareholder communications expenses		44,348
Registration expenses		40,017
Legal and audit fees		36,803
Accounting fees		33,750
Custodian fees		23,509
Shareholder services fees		20,051
Directors’ fees		14,419
Interest expense		622
Miscellaneous expenses		15,582
Total Expenses		770,755
Less:
Expense reimbursements (See Note 3)		(196,584	)
Expenses paid indirectly by broker (See Note 6)		(1,536	)
Total Reimbursements and Credits		(198,120	)
Net Expenses		572,635
Net Investment Income		437,184
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency:
Net realized loss on investments		(49,343	)
Net realized loss on foreign currency transactions		(5,618	)
Net realized loss on investments and foreign currency transactions		(54,961	)
Net change in unrealized appreciation/depreciation: on investments		6,629,787
on foreign currency translations		905
Net change in unrealized appreciation/depreciation on investments and foreign currency translations		6,630,692
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency		6,575,731
Net Increase in Net Assets Resulting from Operations	$	7,012,915

See accompanying notes to financial statements.

9

The Gabelli Global Rising Income and Dividend Fund

Statement of Changes in Net Assets

	Year Ended December 31, 2019				Year Ended December 31, 2018
Operations:
Net investment income		$	437,184			$	710,709
Net realized gain/(loss) on investments and foreign currency transactions			(54,961	)			180,868
Net change in unrealized appreciation/depreciation on investments and foreign currency translations			6,630,692				(8,653,334	)
Net Increase/(Decrease) in Net Assets Resulting from Operations			7,012,915				(7,761,757	)
Distributions to Shareholders:
Accumulated earnings
Class AAA			(29,111	)			(80,933	)
Class A			(6,320	)			(24,198	)
Class C			(2,980	)			(25,409	)
Class I			(478,972	)			(963,201	)
Total Distributions to Shareholders			(517,383	)			(1,093,741	)
Capital Share Transactions:
Class AAA			578,125				(1,815,916	)
Class A			(211,815	)			542,226
Class C			(662,838	)			574,810
Class I			(121,263	)			(13,404,542	)
Net Decrease in Net Assets from Capital Share Transactions			(417,791	)			(14,103,422	)
Redemption Fees			2				—
Net Increase/(Decrease) in Net Assets			6,077,743				(22,958,920	)
Net Assets:
Beginning of year			47,573,046				70,531,966
End of year		$	53,650,789			$	47,573,046

See accompanying notes to financial statements.

10

The Gabelli Global Rising Income and Dividend Fund

Financial Highlights

Selected data for a share of capital stock outstanding throughout each year:

			Income (Loss) from Investment Operations									Distributions																			Ratios to Average Net Assets/ Supplemental Data
Year Ended December 31	Net Asset Value, Beginning of Year		Net Investment Income (Loss)(a)			Net Realized and Unrealized Gain (Loss) on Investments			Total from Investment Operations			Net Investment Income			Net Realized Gain			Return of Capital			Total Distributions			Redemption Fees (a)(b)		Net Asset Value, End of Year		Total Return†			Net Assets End of Year (in 000’s)		Net Investment Income (Loss)			Operating Expenses Before Reimburse- ment			Operating Expenses Net of Reimburse- ment(c)(d)			Portfolio Turnover Rate
Class AAA
2019		$23.00		$ 0.08	(e)		$ 3.22			$ 3.30			$(0.08	)		$(0.04	)		—			$(0.12	)		$0.00		$26.18		14.4	%		$  6,194		0.34	%(e)		1.70	%		1.65	%(f)		5	%
2018		27.20		0.16			(3.98	)		(3.82	)		(0.20	)		(0.18	)		—			(0.38	)		—		23.00		(14.0	)		4,929		0.60			1.67			1.67			20
2017		22.80		0.03			4.74			4.77			(0.07	)		(0.28	)		$(0.02	)		(0.37	)		0.00		27.20		20.9			7,672		0.12			1.62			1.62			24
2016		21.85		0.27			0.91			1.18			(0.23	)		—			—			(0.23	)		—		22.80		5.4			4,598		1.21			1.61			1.61	(g)		52
2015		22.01		(0.09	)		0.22			0.13			—			(0.29	)		—			(0.29	)		—		21.85		0.6			7,121		(0.41	)		1.75			1.75	(h)		167
Class A
2019		$23.04		$ 0.09	(e)		$ 3.21			$ 3.30			$(0.07	)		$(0.04	)		—			$(0.11	)		$0.00		$26.23		14.4	%		$  1,441		0.35	%(e)		1.70	%		1.66	%(f)		5	%
2018		27.26		0.16			(3.99	)		(3.83	)		(0.21	)		(0.18	)		—			(0.39	)		—		23.04		(14.0	)		1,465		0.61			1.67			1.67			20
2017		22.86		0.05			4.74			4.79			(0.09	)		(0.28	)		$(0.02	)		(0.39	)		0.00		27.26		20.9			1,178		0.18			1.62			1.62			24
2016		21.90		0.25			0.93			1.18			(0.22	)		—			—			(0.22	)		—		22.86		5.4			480		1.15			1.61			1.61	(g)		52
2015		22.10		(0.10	)		0.19			0.09			—			(0.29	)		—			(0.29	)		—		21.90		0.4			694		(0.44	)		1.75			1.75	(h)		167
Class C
2019		$19.35		$(0.09	)(e)		$ 2.72			$ 2.63			—			$(0.04	)		—			$(0.04	)		$0.00		$21.94		13.6	%		$  1,836		(0.43	)%(e)		2.45	%		2.37	%(f)		5	%
2018		22.93		(0.02	)		(3.35	)		(3.37	)		$(0.03	)		(0.18	)		—			(0.21	)		—		19.35		(14.7	)		2,245		(0.09	)		2.42			2.42			20
2017		19.36		(0.14	)		4.01			3.87			—			(0.28	)		$(0.02	)		(0.30	)		0.00		22.93		20.0			2,127		(0.62	)		2.37			2.37			24
2016		18.61		0.06			0.80			0.86			(0.11	)		—			—			(0.11	)		—		19.36		4.6			721		0.31			2.36			2.36	(g)		52
2015		18.97		(0.24	)		0.17			(0.07	)		—			(0.29	)		—			(0.29	)		—		18.61		(0.4	)		595		(1.26	)		2.50			2.20	(h)		167
Class I
2019		$23.08		$ 0.25	(e)		$ 3.24			$ 3.49			$(0.25	)		$(0.04	)		—			$(0.29	)		$0.00		$26.28		15.1	%		$44,180		1.01	%(e)		1.45	%		0.99	%(f)		5	%
2018		27.35		0.35			(4.04	)		(3.69	)		(0.40	)		(0.18	)		—			(0.58	)		—		23.08		(13.40	)		38,934		1.32			1.42			1.00	(f)		20
2017		22.89		0.19			4.78			4.97			(0.21	)		(0.28	)		$(0.02	)		(0.51	)		0.00		27.35		21.7			59,555		0.74			1.37			1.00	(f)		24
2016		21.94		0.31			0.95			1.26			(0.31	)		—			—			(0.31	)		—		22.89		5.8			37,344		1.39			1.36			1.27	(f)(g)		52
2015		22.13		(0.04	)		0.17			0.13			(0.03	)		(0.29	)		—			(0.32	)		—		21.94		0.6			36,371		(0.19	)		1.50			1.50	(h)		167

  † Total return represents aggregate total return of a hypothetical $1,000 investment at the beginning of the year and sold at the end of the year including reinvestment of distributions and does not reflect the applicable sales charges.

(a) Per share amounts have been calculated using the average shares outstanding method.

(b) Amount represents less than $0.005 per share.

(c) The Fund received credits from a designated broker who agreed to pay certain Fund operating expenses. For the years ended December 31, 2019, 2018, 2017, and 2016, there was no impact to the expenses ratio. For the year ended December 31, 2015, if credits had not been received, the ratios of operating expenses to average net assets would have been 1.76% (Class AAA and Class A), 2.51% (Class C), and 1.51% (Class I).

(d) The Fund incurred interest expense during the years ended December 31, 2019, 2018, 2017, 2016, and 2015, and the effect of the interest expense was minimal.

(e) Includes income resulting from special dividends. Without these dividends, the per share income amounts would have been 0.03 (Class AAA), 0.04 (Class A), (0.13) (Class C), and 0.20 (Class I), and the net investment income ratio would have been 0.14% (Class AAA and Class A), (0.64%) (Class C), and 0.80% (Class I), respectively.

(f) Under an expense reimbursement agreement with the Adviser, the Adviser reimbursed expenses of $196,584 for the year ended December 31, 2019 and certain Class I expenses to the Fund of $211,071, $175,468, and $36,018 for the years ended December 31, 2018, 2017, and 2016, respectively.

(g) During the year ended December 31, 2016, the Fund received reimbursements of custody expenses paid in prior years. Had such reimbursement (allocated by relative net asset values of the Fund’s share classes) been included in this period, the expense ratios would have been 1.46% (Class AAA), 1.44% (Class A), 2.20% (Class C), and 1.10% (Class I).

(h) Under an expense deferral agreement with the Adviser, the Adviser recovered from the Fund $62,315 for the year ended December 31, 2015, representing previously reimbursed expenses from the Adviser. Had such payment not been made, the expense ratio would have been 1.61% (Class AAA and Class A), 2.36% (Class C), and 1.36% (Class I).

See accompanying notes to financial statements.

11

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements

1. Organization.The Gabelli Global Rising Income and Dividend Fund, a series of GAMCO Global SeriesFunds, Inc. (the Corporation), was incorporated on July 16, 1993 in Maryland. The Fund is anon-diversifiedopen-end management investment company registered under the Investment Company Act of 1940, as amended (the 1940 Act), and is one of five separately managed portfolios (collectively, the Portfolios) of the Corporation. The Fund’s primary objective is to obtain a high level of total return through a combination of income and capital appreciation. The Fund commenced investment operations on February 3, 1994.

2. Significant Accounting Policies.As an investment company, the Fund follows the investment companyaccounting and reporting guidance, which is part of U.S. generally accepted accounting principles (GAAP) that may require the use of management estimates and assumptions in the preparation of its financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

New Accounting Pronouncements.To improve the effectiveness of fair value disclosure requirements, theFinancial Accounting Standards Board recently issued Accounting Standard Update (ASU)2018-13, Fair Value Measurement Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU2018-13), which adds, removes, and modifies certain aspects relating to fair value disclosure. ASU2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption of the additions relating to ASU2018-13 is not required, even if early adoption is elected for the removals and modifications under ASU2018-13. Management has early adopted the removals and modifications set forth in ASU2018-13 in these financial statements and has not early adopted the additions set forth in ASU2018-13.

Security Valuation.Portfolio securities listed or traded on a nationally recognized securities exchange or tradedin the U.S.over-the-counter market for which market quotations are readily available are valued at the last quoted sale price or a market’s official closing price as of the close of business on the day the securities are being valued. If there were no sales that day, the security is valued at the average of the closing bid and asked prices or, if there were no asked prices quoted on that day, then the security is valued at the closing bid price on that day. If no bid or asked prices are quoted on such day, the security is valued at the most recently available price or, if the Board of Directors (the Board) so determines, by such other method as the Board shall determine in good faith to reflect its fair market value. Portfolio securities traded on more than one national securities exchange or market are valued according to the broadest and most representative market, as determined by Gabelli Funds, LLC (the Adviser).

Portfolio securities primarily traded on a foreign market are generally valued at the preceding closing values of such securities on the relevant market, but may be fair valued pursuant to procedures established by the Board if market conditions change significantly after the close of the foreign market, but prior to the close of business on the day the securities are being valued. Debt obligations for which market quotations are readily available are valued at the average of the latest bid and asked prices. If there were no asked prices quoted on such day, the security is valued using the closing bid price. Such debt obligations are valued through prices provided by a pricing service approved by the Board. Certain securities are valued principally using dealer quotations.

Securities and assets for which market quotations are not readily available are fair valued as determined by the Board. Fair valuation methodologies and procedures may include, but are not limited to: analysis and review of available financial andnon-financial information about the company; comparisons with the valuation and

12

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

changes in valuation of similar securities, including a comparison of foreign securities with the equivalent U.S. dollar value American Depositary Receipt securities at the close of the U.S. exchange; and evaluation of any other information that could be indicative of the value of the security.

The Fund employs a fair value model to adjust prices to reflect events affecting the values of certain portfolio securities which occur between the close of trading on the principal market for such securities (foreign exchanges andover-the-counter markets) at the time when net asset values of the Fund are determined. If the Fund’s valuation committee believes that a particular event would materially affect net asset value, further adjustment is considered.

The inputs and valuation techniques used to measure fair value of the Fund’s investments are summarized into three levels as described in the hierarchy below:

● Level 1 — quoted prices in active markets for identical securities;

● Level 2 — other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.); and

● Level 3 — significant unobservable inputs (including the Board’s determinations as to the fair value of investments).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input both individually and in the aggregate that is significant to the fair value measurement. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. The summary of the Fund’s investments in securities by inputs used to value the Fund’s investments as of December 31, 2019 is as follows:

	Valuation Inputs
	Level 1 Quoted Prices			Level 2 Other Significant Observable Inputs			Level 3 Significant Unobservable Inputs			Total Market Value at 12/31/19
INVESTMENTS IN SECURITIES:
ASSETS (Market Value):
Common Stocks:
Energy and Utilities		$	2,434,229			—		$	0		$	2,434,229
Other Industries (a)			48,937,390			—			—			48,937,390
Total Common Stocks			51,371,619			—			0			51,371,619
Convertible Corporate Bonds (a)			—		$	131,910			—			131,910
U.S. Government Obligations			—			1,574,413			—			1,574,413
TOTAL INVESTMENTS IN SECURITIES – ASSETS		$	51,371,619		$	1,706,323		$	0		$	53,077,942

(a) Please refer to the Schedule of Investments for the industry classifications of these portfolio holdings.

The Fund did not have any transfers into or out of Level 3 during the year ended December 31, 2019.

Additional Information to Evaluate Qualitative Information.

General.The Fund uses recognized industry pricing services – approved by the Board and unaffiliated withthe Adviser – to value most of its securities, and uses broker quotes provided by market makers of securities not valued by these and other recognized pricing sources. Several different pricing feeds are received to value domestic equity securities, international equity securities, preferred equity securities, and fixed income securities. The data within these feeds are ultimately sourced from major stock exchanges and trading systems where

13

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

these securities trade. The prices supplied by external sources are checked by obtaining quotations or actual transaction prices from market participants. If a price obtained from the pricing source is deemed unreliable, prices will be sought from another pricing service or from a broker/dealer that trades that security or similar securities.

Fair Valuation.Fair valued securities may be common or preferred equities, warrants, options, rights, or fixedincome obligations. Where appropriate, Level 3 securities are those for which market quotations are not available, such as securities not traded for several days, or for which current bids are not available, or which are restricted as to transfer. When fair valuing a security, factors to consider include recent prices of comparable securities that are publicly traded, reliable prices of securities not publicly traded, the use of valuation models, current analyst reports, valuing the income or cash flow of the issuer, or cost if the preceding factors do not apply. A significant change in the unobservable inputs could result in a lower or higher value in Level 3 securities. The circumstances of Level 3 securities are frequently monitored to determine if fair valuation measures continue to apply.

The Adviser reports quarterly to the Board the results of the application of fair valuation policies and procedures. These may include backtesting the prices realized in subsequent trades of these fair valued securities to fair values previously recognized.

Derivative Financial Instruments.The Fund may engage in various portfolio investment strategies by investingin derivative financial instruments for the purposes of increasing the income of the Fund, hedging against changes in the value of its portfolio securities and in the value of securities it intends to purchase, or hedging against a specific transaction with respect to either the currency in which the transaction is denominated or another currency. Investing in certain derivative financial instruments, including participation in the options, futures, or swap markets, entails certain execution, liquidity, hedging, tax, and securities, interest, credit, or currency market risks. Losses may arise if the Adviser’s prediction of movements in the direction of the securities, foreign currency, and interest rate markets is inaccurate. Losses may also arise if the counterparty does not perform its duties under a contract, or that, in the event of default, the Fund may be delayed in or prevented from obtaining payments or other contractual remedies owed to it under derivative contracts. The creditworthiness of the counterparties is closely monitored in order to minimize these risks. Participation in derivative transactions involves investment risks, transaction costs, and potential losses to which the Fund would not be subject absent the use of these strategies. The consequences of these risks, transaction costs, and losses may have a negative impact on the Fund’s ability to pay distributions.

Collateral requirements differ by type of derivative. Collateral requirements are set by the broker or exchange clearing house for exchange traded derivatives, while collateral terms are contract specific for derivatives tradedover-the-counter. Securities pledged to cover obligations of the Fund under derivative contracts, if any, are noted in the Schedule of Investments. Cash collateral, if any, pledged for the same purpose will be reported separately in the Statement of Assets and Liabilities.

The Fund’s policy with respect to offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the master agreement does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the Fund and the applicable counterparty. The enforceability of the right to offset may vary by jurisdiction.

14

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

The Fund’s derivative contracts held at December 31, 2019, if any, are not accounted for as hedging instruments under GAAP and are disclosed in the Schedule of Investments together with the related counterparty.

Forward Foreign Exchange Contracts.The Fund may engage in forward foreign exchange contracts for thepurpose of hedging a specific transaction with respect to either the currency in which the transaction is denominated or another currency as deemed appropriate by the Adviser. Forward foreign exchange contracts are valued at the forward rate and aremarked-to-market daily. The change in market value is included in unrealized appreciation/depreciation on investments and foreign currency translations. When the contract is closed, the Fund records a realized gain or loss equal to the difference between the value of the contract at the time it was opened and the value at the time it was closed.

The use of forward foreign exchange contracts does not eliminate fluctuations in the underlying prices of the Fund’s portfolio securities, but it does establish a rate of exchange that can be achieved in the future. Although forward foreign exchange contracts limit the risk of loss due to a decline in the value of the hedged currency, they also limit any potential gain that might result should the value of the currency increase. As of December 31, 2019, the Fund held no forward foreign exchange contracts.

Securities Sold Short.The Fund may enter into short sale transactions. Short selling involves selling securitiesthat may or may not be owned and, at times, borrowing the same securities for delivery to the purchaser, with an obligation to replace such borrowed securities at a later date. The proceeds received from short sales are recorded as liabilities and the Fund records an unrealized gain or loss to the extent of the difference between the proceeds received and the value of an open short position on the day of determination. The Fund records a realized gain or loss when the short position is closed out. By entering into a short sale, the Fund bears the market risk of an unfavorable change in the price of the security sold short. Dividends on short sales are recorded as an expense by the Fund on theex-dividend date and interest expense is recorded on the accrual basis. The broker retains collateral for the value of the open positions, which is adjusted periodically as the value of the position fluctuates. At December 31, 2019, there were no short sales outstanding.

Foreign Currency Translations.The books and records of the Fund are maintained in U.S. dollars. Foreigncurrencies, investments, and other assets and liabilities are translated into U.S. dollars at current exchange rates. Purchases and sales of investment securities, income, and expenses are translated at the exchange rate prevailing on the respective dates of such transactions. Unrealized gains and losses that result from changes in foreign exchange rates and/or changes in market prices of securities have been included in unrealized appreciation/depreciation on investments and foreign currency translations. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of interest and dividends recorded on the books of the Fund and the amounts actually received. The portion of foreign currency gains and losses related to fluctuation in exchange rates between the initial purchase trade date and subsequent sale trade date is included in realized gain/(loss) on investments.

Foreign Securities.The Fund may directly purchase securities of foreign issuers. Investing in securities offoreign issuers involves special risks not typically associated with investing in securities of U.S. issuers. The risks include possible revaluation of currencies, the inability to repatriate funds, less complete financial information about companies, and possible future adverse political and economic developments. Moreover, securities of

15

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

many foreign issuers and their markets may be less liquid and their prices more volatile than those of securities of comparable U.S. issuers.

Foreign Taxes.The Fund may be subject to foreign taxes on income, gains on investments, or currency repatriation,a portion of which may be recoverable. The Fund will accrue such taxes and recoveries as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Restricted Securities.The Fund may invest up to 15% of its net assets in securities for which the marketsare restricted. Restricted securities include securities whose disposition is subject to substantial legal or contractual restrictions. The sale of restricted securities often requires more time and results in higher brokerage charges or dealer discounts and other selling expenses than does the sale of securities eligible for trading on national securities exchanges or in theover-the-counter markets. Restricted securities may sell at a price lower than similar securities that are not subject to restrictions on resale. Securities freely saleable among qualified institutional investors under special rules adopted by the SEC may be treated as liquid if they satisfy liquidity standards established by the Board. The continued liquidity of such securities is not as well assured as that of publicly traded securities, and accordingly the Board will monitor their liquidity. For the restricted securities the Fund held as of December 31, 2019, if any, refer to the Schedule of Investments.

Investments in other Investment Companies.The Fund may invest, from time to time, in shares of otherinvestment companies (or entities that would be considered investment companies but are excluded from the definition pursuant to certain exceptions under the 1940 Act) (the Acquired Funds) in accordance with the 1940 Act and related rules. Shareholders in the Fund would bear the pro rata portion on of the periodic expenses of the Acquired Funds in addition to the Fund’s expenses. For the year ended December 31, 2019, the Fund’s pro rata portion of the periodic expenses charged by the Acquired Funds was less than one basis point.

Securities Transactions and Investment Income.Securities transactions are accounted for on the trade datewith realized gain or loss on investments determined by using the identified cost method. Interest income (including amortization of premium and accretion of discount) is recorded on the accrual basis. Premiums and discounts on debt securities are amortized using the effective yield to maturity method. Dividend income is recorded on theex-dividend date, except for certain dividends from foreign securities that are recorded as soon after theex-dividend date as the Fund becomes aware of such dividends.

Determination of Net Asset Value and Calculation of Expenses.Certain administrative expenses are commonto, and allocated among, various affiliated funds. Such allocations are made on the basis of each fund’s average net assets or other criteria directly affecting the expenses as determined by the Adviser pursuant to procedures established by the Board.

In calculating the NAV per share of each class, investment income, realized and unrealized gains and losses, redemption fees, and expenses other than class specific expenses are allocated daily to each class of shares based upon the proportion of net assets of each class at the beginning of each day. Distribution expenses are borne solely by the class incurring the expense.

Distributions to Shareholders. Distributions to shareholders are recorded on theex-dividend date. Distributions to shareholders are based on income and capital gains as determined in accordance with federal income tax regulations, which may differ from income and capital gains as determined under GAAP. These differences are primarily due to differing treatments of income and gains on various investment securities and foreign

16

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

currency transactions held by the Fund, timing differences, and differing characterizations of distributions made by the Fund. Distributions from net investment income for federal income tax purposes include net realized gains on foreign currency transactions. These book/tax differences are either temporary or permanent in nature. To the extent these differences are permanent, adjustments are made to the appropriate capital accounts in the period when the differences arise. Permanent differences were primarily due to reclasses of realized foreign currency and redesignation of dividends paid. These reclassifications have no impact on the NAV of the Fund. For the year ended December 31, 2019, reclassifications were made to decreasepaid-in capital by $135, with an offsetting adjustment to total distributable earnings.

The tax character of distributions paid during the years ended December 31, 2019 and 2018 were as follows:

	Year Ended December 31, 2019			Year Ended December 31, 2018
Distributions paid from:
Ordinary income (inclusive of short term capital gains)		$	502,720		$	718,621
Net long term capital gains			14,663			375,120
Total distributions paid		$	517,383		$	1,093,741

Provision for Income Taxes.The Fund intends to continue to qualify as a regulated investment companyunder Subchapter M of the Internal Revenue Code of 1986, as amended (the Code). It is the policy of the Fund to comply with the requirements of the Code applicable to regulated investment companies and to distribute substantially all of its net investment company taxable income and net capital gains. Therefore, no provision for federal income taxes is required.

At December 31, 2019, the components of accumulated earnings/losses on a tax basis were as follows:

Net unrealized appreciation on investments and foreign currency translations	$	9,063,576
Total	$	9,063,576

The Fund is permitted to carry capital losses forward for an unlimited period. Capital losses that are carried forward will retain their character as either short term or long term capital losses.

At December 31, 2019, the temporary differences between book basis and tax basis unrealized appreciation were primarily due to deferral of losses from wash sales for tax purposes,mark-to-market adjustments on investments in passive foreign investment companies.

The following summarizes the tax cost of investments and the related net unrealized appreciation at December 31, 2019:

	Cost/ (Proceeds)		Gross Unrealized Appreciation		Gross Unrealized Depreciation			Net Unrealized Appreciation
Investments	$	44,014,897	$	13,681,540	$	(4,618,495	)	$	9,063,045

The Fund is required to evaluate tax positions taken or expected to be taken in the course of preparing the Fund’s tax returns to determine whether the tax positions are“more-likely-than-not” of being sustained by the applicable tax authority. Income tax and related interest and penalties would be recognized by the Fund as tax expense in the Statement of Operations if the tax positions were deemed not to meet themore-likely-than-not threshold. As of December 31, 2019, the Adviser has reviewed all open tax years and concluded that there was no impact to the Fund’s net assets or results of operations. The Fund’s federal and state tax returns for

17

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

the prior three fiscal years remain open, subject to examination. On an ongoing basis, the Adviser will monitor the Fund’s tax positions to determine if adjustments to this conclusion are necessary.

3. Investment Advisory Agreement and Other Transactions.The Fund has entered into an investmentadvisory agreement (the Advisory Agreement) with the Adviser which provides that the Fund will pay the Adviser a fee, computed daily and paid monthly, at the annual rate of 1.00% of the value of its average daily net assets. In accordance with the Advisory Agreement, the Adviser provides a continuous investment program for the Fund’s portfolio, oversees the administration of all aspects of the Fund’s business and affairs, and pays the compensation of all Officers and Directors of the Fund who are affiliated persons of the Adviser.

Through November 30, 2019, the Adviser had agreed to waive and/or to reimburse expenses of the Fund to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) at no more than 2.00%, 2.00%, 2.75%, and 1.00% of the value of the Fund’s average daily net assets for Class AAA, Class A, Class C, and Class I Shares, respectively. Effective December 1, 2019, the Adviser amended its contractual agreement with respect to each share class of the Fund to waive its investment advisory fees and/or to reimburse expenses to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) until at least April 30, 2021, at no more than 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. During the year ended December 31, 2019, the Adviser reimbursed expenses in the amount of $196,584. In addition, the Fund has agreed, during the two year period following any waiver or reimbursement by the Adviser, to repay such amount to the extent, after giving effect to the repayment, such adjusted annualized total operating expenses of the Fund would not exceed 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. The agreement is renewable annually. At December 31, 2019, the cumulative amount which the Fund may repay the Adviser, subject to the terms above, is $407,655:

For the year ended December 31, 2018, expiring December 31, 2020	$	211,071
For the year ended December 31, 2019, expiring December 31, 2021		196,584
	$	407,655

The Corporation pays each Director who is not considered to be an affiliated person an annual retainer of $6,000 plus $1,000 for each Board meeting attended, and they are reimbursed for any out of pocket expenses incurred in attending meetings. All Board committee members receive $1,000 per meeting attended. The Chairman of the Audit Committee receives an annual fee of $3,000, and the Lead Director receives an annual fee of $2,000. A Director may receive a single meeting fee, allocated among the participating funds, for attending certain meetings held on behalf of multiple funds. Directors who are directors or employees of the Adviser or an affiliated company receive no compensation or expense reimbursement from the Corporation.

4. Distribution Plan.The Fund’s Board has adopted a distribution plan (the Plan) for each class of shares,except for Class I Shares, pursuant to Rule12b-1 under the 1940 Act. Under the Class AAA, Class A, and Class C Share Plans, payments are authorized to G.distributors, LLC (the Distributor), an affiliate of the Adviser, at annual rates of 0.25%, 0.25%, and 1.00%, respectively, of the average daily net assets of those classes, the annual limitations under each Plan. Such payments are accrued daily and paid monthly.

18

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

5. Portfolio Securities.Purchases and sales of securities during the year ended December 31, 2019, otherthan short term securities and U.S. Government obligations, aggregated $2,742,136 and $4,865,910, respectively.

6. Transactions with Affiliates and Other Arrangements.During the year ended December 31, 2019, theFund paid brokerage commissions on security trades of $3,394 to G.research, LLC, an affiliate of the Adviser. Additionally, the Distributor retained a total of $2,755 from investors representing commissions (sales charges and underwriting fees) on sales and redemptions of Fund shares.

The Fund received credits from a designated broker who agreed to pay certain Fund operating expenses. The amount of such expenses paid through this directed brokerage arrangement during this period was $1,536.

The cost of calculating the Fund’s NAV per share is a Fund expense pursuant to the Advisory Agreement. Under thesub-administration agreement with Bank of New York Mellon, the fees paid include the cost of calculating the Fund’s NAV. The Fund reimburses the Adviser for this service. During the year ended December 31, 2019, the Fund accrued $33,750 in accounting fees in the Statement of Operations.

7. Line of Credit.The Fund participates in an unsecured line of credit which expires on March 4, 2020 andmay be renewed annually, of up to $75,000,000 under which it may borrow up to 10% of its net assets from the custodian for temporary borrowing purposes. Borrowings under this arrangement bear interest at a floating rate equal to the higher of the overnight Federal Funds rate plus 125 basis points or the 30 day ICE LIBOR plus 125 basis points in effect on that day. This amount, if any, would be included in “Interest expense” in the Statement of Operations. During the year ended December 31, 2019, there were no borrowings under the line of credit.

8. Capital Stock.The Fund offers four classes of shares – Class AAA Shares, Class A Shares, Class C Shares,and Class I Shares. Class AAA and Class I Shares are offered without a sales charge. Class A Shares are subject to a maximumfront-end sales charge of 5.75%, and Class C Shares are subject to a 1.00% contingent deferred sales charge for one year after purchase.

The Fund imposes a redemption fee of 2.00% on all classes of shares that are redeemed or exchanged on or before the seventh day after the date of a purchase. The redemption fee is deducted from the proceeds otherwise payable to the redeeming shareholders and is retained by the Fund as an increase inpaid-in capital. The redemption fees retained by the Fund during the years ended December 31, 2019 and 2018, if any, can be found in the Statement of Changes in Net Assets under Redemption Fees.

19

The Gabelli Global Rising Income and Dividend Fund

Notes to Financial Statements (Continued)

Transactions in shares of capital stock were as follows:

	Year Ended December 31, 2019						Year Ended December 31, 2018
	Shares			Amount			Shares			Amount
Class AAA
Shares sold		55,209		$	1,412,343			17,059		$	459,298
Shares issued upon reinvestment of distributions		1,071			28,072			3,432			77,851
Shares redeemed		(34,012	)		(862,290	)		(88,188	)		(2,353,065	)
Net increase/(decrease)		22,268		$	578,125			(67,697	)	$	(1,815,916	)
Class A
Shares sold		14,445		$	363,666			43,934		$	1,173,482
Shares issued upon reinvestment of distributions		235			6,170			1,015			23,051
Shares redeemed		(23,320	)		(581,651	)		(24,574	)		(654,307	)
Net increase/(decrease)		(8,640	)	$	(211,815	)		20,375		$	542,226
Class C
Shares sold		19,741		$	423,760			58,420		$	1,332,127
Shares issued upon reinvestment of distributions		133			2,922			1,314			25,079
Shares redeemed		(52,188	)		(1,089,520	)		(36,509	)		(782,396	)
Net increase/(decrease)		(32,314	)	$	(662,838	)		23,225		$	574,810
Class I
Shares sold		51,137		$	1,300,988			251,351		$	6,807,172
Shares issued upon reinvestment of distributions		11,724			308,583			42,320			963,201
Shares redeemed		(69,005	)		(1,730,834	)		(784,393	)		(21,174,915	)
Net decrease		(6,144	)	$	(121,263	)		(490,722	)	$	(13,404,542	)

9. Significant Shareholder.As of December 31, 2019, approximately 77.3% of the Fund was beneficiallyowned by the Adviser and its affiliates, including managed accounts for which the affiliates of the Adviser have voting control but disclaim pecuniary interest.

10. Indemnifications.The Fund enters into contracts that contain a variety of indemnifications. The Fund’smaximum exposure under these arrangements is unknown. However, the Fund has not had prior claims or losses pursuant to these contracts. Management has reviewed the Fund’s existing contracts and expects the risk of loss to be remote.

11. Subsequent Events.Management has evaluated the impact on the Fund of all subsequent events occurringthrough the date the financial statements were issued and has determined that there were no subsequent events requiring recognition or disclosure in the financial statements.

20

The Gabelli Global Rising Income and Dividend Fund

Report of Independent Registered Public Accounting Firm

To the Shareholders of The Gabelli Global Rising Income and Dividend Fund

and the Board of Directors of GAMCO Global Series Funds, Inc.

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of The Gabelli Global Rising Income and Dividend Fund (the “Fund”) (one of the funds constituting GAMCO Global Series Funds, Inc. (the “Corporation”)), including the schedule of investments, as of December 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, the financial highlights for each of the five years in the period then ended and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund (one of the funds constituting GAMCO Global Series Funds, Inc.) at December 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and its financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Corporation’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Corporation in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Corporation is not required to have, nor were we engaged to perform, an audit of the Corporation’s internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Corporation’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2019, by correspondence with the custodian. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the auditor of one or more Gabelli/GAMCO Funds investment companies since 1992.

Philadelphia, Pennsylvania

February 27, 2020

21

The Gabelli Global Rising Income and Dividend Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited)

During the six months ended December 31, 2019, the Board of Directors of the Corporation approved the continuation of the investment advisory agreement with the Adviser for the Fund on the basis of the recommendation by the directors (the Independent Board Members) who are not interested persons of the Fund. The following paragraphs summarize the material information and factors considered by the Independent Board Members as well as their conclusions relative to such factors.

Nature, Extent, and Quality of Services.The Independent Board Members considered information regardingthe portfolio managers, the depth of the analyst pool available to the Adviser and the Fund’s portfolio managers, the scope of supervisory, administrative, shareholder and other services supervised or provided by the Adviser and the absence of significant service problems reported to the Board. The Independent Board Members noted the experience, length of service and reputation of the Fund’s portfolio managers.

Investment Performance.The Independent Board Members reviewed the short, medium, and long term performanceof the Fund (as of September 30, 2019) against a peer group of seven other comparable funds prepared by the Adviser (the Adviser Peer Group), and against a peer group prepared by Broadridge (the Broadridge Performance Peer Group) consisting of all retail and institutional global equity income funds, regardless of asset size or primary channel of distribution, as represented by the Lipper Global Equity Income Fund Index. The Independent Board Members noted that the Fund’s performance was in the fourth (lowest) quartile for the one, three and five year periods, as measured against the Adviser Peer Group. Against the Broadridge Performance Peer Group, the Independent Board Members noted that the Fund’s performance was in the fifth quintile for the one, three, and ten year periods and in the fourth quintile for the five year period. The Independent Board Members discussed the peer groups in relation to the Fund’s shift in strategy several years ago, and also noted the resulting limited utility of the five year peer performance comparison.

Profitability.The Independent Board Members reviewed summary data regarding the profitability of the Fundto the Adviser both with a pro rata administrative overhead charge and with a stand alone administrative charge and noted the effect of the expense limitation agreement. The Independent Board Members also noted that a portion of the Fund’s portfolio transactions were executed by an affiliated broker of the Adviser and that another affiliated broker of the Adviser received distribution fees and minor amounts of sales commissions.

Economies of Scale.The Independent Board Members discussed the major elements of the Adviser’s coststructure, the relationship of those elements to potential economies of scale and reviewed data provided by the Adviser.

Sharing of Economies of Scale.The Independent Board Members noted that the investment managementfee schedule for the Fund does not take into account any potential economies of scale that may develop.

Service and Cost Comparisons.The Independent Board Members compared the expense ratios of the investmentmanagement fee, other expenses and total expenses of the Fund to similar expense ratios of the Adviser Peer Group and a peer group of seven other global equity income funds selected by Broadridge (the Broadridge Expense Peer Group), and noted that the Adviser’s management fee includes substantially all administrative services of the Fund as well as investment advisory services. The Independent Board Members noted the effect of the expense limitation agreement in place for the Fund. The Board Members noted that the Fund’s total expense ratio was the highest for the Adviser Peer Group and for the Broadridge Expense Peer Group and that, the Fund’s size was significantly lower than the average of the Adviser Peer Group, and lower than the

22

The Gabelli Global Rising Income and Dividend Fund

Board Consideration and Re-Approval of Investment Advisory  Agreement (Unaudited) (Continued)

average of the Broadridge Expense Peer Group. The Independent Board Members also noted that the advisory fee structure was the same as that in effect for most of the Gabelli funds. The Independent Board Members were presented with, but did not consider to be material to their decision, various information comparing the advisory fee to the fee for other types of accounts managed by the Adviser.

Conclusions.The Independent Board Members concluded that the Fund enjoyed highly experienced portfoliomanagement services, good ancillary services and did not have a favorable performance record. The Independent Board Members also concluded that the Fund’s expense ratios and profitability to the Adviser were reasonable, and that economies of scale were not a significant factor in their thinking at this time. The Board Members did not view the potential profitability of ancillary services as material to their decision. On the basis of the foregoing and without assigning particular weight to any single conclusion, the Independent Board Members determined to recommend continuation of the investment advisory agreement to the full Board.

Based on a consideration of all these factors in their totality, the Board Members, including all of the Independent Board Members, determined that the Fund’s advisory fee was fair and reasonable with respect to the quality of services provided and in light of the other factors described above that the Board deemed relevant. Accordingly, the Board Members determined to approve the continuation of the Fund’s Advisory Agreement. The Board Members based their decision on evaluations of all these factors as a whole and did not consider any one factor asall-important or controlling.

23

The Gabelli Global Rising Income and Dividend Fund

Additional Fund Information (Unaudited)

The business and affairs of the Fund are managed under the direction of the Corporation’s Board of Directors. Information pertaining to the Directors and officers of the Fund is set forth below. The Corporation’s Statement of Additional Information includes additional information about the Fund’s Directors and is available without charge, upon request, by calling800-GABELLI(800-422-3554) or by writing to The Gabelli Global Rising Income and Dividend Fund at One Corporate Center, Rye, NY 10580-1422.

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Number of Funds in Fund Complex Overseen by  Director	Principal Occupation(s) During Past Five Years	Other Directorships Held by Director3
INTERESTED DIRECTORS4:
Mario J. Gabelli, CFA Director and Chief Investment Officer Age: 77	Since 1993	33	Chairman, Chief Executive Officer, and Chief Investment Officer– Value Portfolios of GAMCO Investors, Inc. and Chief Investment Officer– Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc.; Director/ Trustee or Chief Investment Officer of other registered investment companies within the Gabelli/GAMCO Fund Complex; Chief Executive Officer of GGCP, Inc.; Executive Chairman of Associated Capital Group, Inc.	Director of Morgan Group Holdings, Inc. (holding company) (2001-2019); Chairman of the Board and Chief Executive Officer of LICT Corp. (multimedia and communication services company); Director of CIBL, Inc. (broadcasting and wireless communications); Director of ICTC Group Inc. (communications)(2013-2018)
John D. Gabelli Director Age: 75	Since 1993	12	Senior Vice President of G.research, LLC	—
INDEPENDENT DIRECTORS5:
E. Val Cerutti Director Age: 80	Since 2001	7	Chief Executive Officer of Cerutti Consultants, Inc.	Director of The LGL Group, Inc. (diversified manufacturing)(1990-2009)
Anthony J. Colavita6 Director Age: 84	Since 1993	20	President of the law firm of Anthony J. Colavita, P.C.	—
Werner J. Roeder Director Age: 79	Since 1993	21	Retired physician; Former Vice President of Medical Affairs (Medical Director) of New York Presbyterian/Lawrence Hospital(1999-2014)	—
Anthonie C. van Ekris6 Director Age: 85	Since 1993	23	Chairman and Chief Executive Officer of BALMAC International, Inc. (global import/ export company)	—
Salvatore J. Zizza7 Director Age: 74	Since 2004	31	President of Zizza & Associates Corp. (private holding company); President of Bergen Cove Realty Inc.; Chairman of Harbor Diversified, Inc. (pharmaceuticals) (2009-2018); Chairman of BAM (semiconductor and aerospace manufacturing) (2000-2018); Chairman of Metropolitan Paper Recycling Inc. (recycling)(2005-2014)	Director and Chairman of Trans- Lux Corporation (business services); Director and Chairman of Harbor Diversified Inc. (pharmaceuticals) (2009-2018)

24

The Gabelli Global Rising Income and Dividend Fund

Additional Fund Information (Continued) (Unaudited)

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2	Principal Occupation(s) During Past Five Years
OFFICERS:
Bruce N. Alpert President Age: 68	Since 1993	Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC since 1988; Officer of registered investment companies within the Gabelli/GAMCO Fund Complex; Senior Vice President of GAMCO Investors, Inc. since 2008
John C. Ball Treasurer Age: 43	Since 2017	Treasurer of funds within the Gabelli/GAMCO Fund Complex since 2017; Vice President and Assistant Treasurer of AMG Funds, 2014-2017; Vice President of State Street Corporation, 2007-2014
Agnes Mullady Vice President Age: 61	Since 2006	Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2006; President and Chief Operating Officer of the Fund Division of Gabelli Funds, LLC since 2015; Chief Executive Officer of G.distributors, LLC since 2010; Senior Vice President of GAMCO Investors, Inc. since 2009; Vice President of Gabelli Funds, LLC since 2007; Executive Vice President of Associated Capital Group, Inc. since 2016
Andrea R. Mango Secretary Age: 47	Since 2013	Vice President of GAMCO Investors, Inc. since 2016; Counsel of Gabelli Funds, LLC since 2013; Secretary of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013; Vice President ofclosed-end funds within the Gabelli/GAMCO Fund Complex since 2014
Richard J. Walz Chief Compliance Officer Age: 60	Since 2013	Chief Compliance Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013

¹  Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.

²  Each Director will hold office for an indefinite term until the earliest of (i) the next meeting of shareholders, if any, called for the purpose of considering the election orre-election of such Director and until the election and qualification of his or her successor, if any, elected at such meeting, or (ii) the date a Director resigns or retires, or a Director is removed by the Board of Directors or shareholders, in accordance with the Corporation’sBy-Laws and Articles of Incorporation. For officers, includes time served in prior officer positions with the Fund. Each officer will hold office for an indefinite term until the date he or she resigns or retires or until his or her successor is elected and qualified.

³  This column includes only directorships of companies required to report to the SEC under the Securities Exchange Act of 1934, as amended, i.e., public companies, or other investment companies registered under the 1940 Act.

⁴  “Interested person” of the Corporation as defined in the 1940 Act. Messrs. Mario J. Gabelli and John D. Gabelli, who are brothers, are each considered an “interested person” because of their affiliation with Gabelli Funds, LLC which acts as the Corporation’s investment adviser.

⁵  Directors who are not interested persons are considered “Independent” Directors.

⁶  Mr. Colavita’s son, Anthony S. Colavita, serves as a director of other funds in the Gabelli/GAMCO Fund Complex. Mr. van Ekris is an independent director of Gabelli International Ltd., Gabelli Fund LDC, GAMA Capital Opportunities Master Ltd., and GAMCO International SICAV, all of which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and, in that event, would be deemed to be under common control with the Fund’s Adviser.

⁷  Mr. Zizza is an independent director of Gabelli International Ltd., which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and in that event would be deemed to be under common control with the Fund’s Adviser. On September 9, 2015, Mr. Zizza entered into a settlement with the SEC to resolve an inquiry relating to an alleged violation regarding the making of false statements or omissions to the accountants of a company concerning a related party transaction. The company in question is not an affiliate of, nor has any connection to, the Fund. Under the terms of the settlement, Mr. Zizza, without admitting or denying the SEC’s findings and allegation, paid $150,000 and agreed to cease and desist committing or causing any future violations of Rule13b2-2 of the Securities Exchange Act of 1934, as amended. The Board has discussed this matter and has determined that it does not disqualify Mr. Zizza from serving as an Independent Director.

25

Gabelli/GAMCO Funds and Your Personal Privacy

Who are we?

The Gabelli/GAMCO Funds are investment companies registered with the Securities and Exchange Commission under the Investment Company Act of 1940. We are managed by Gabelli Funds, LLC, which is affiliated with GAMCO Investors, Inc., a publicly held company with subsidiaries and affiliates that provide investment advisory services for a variety of clients.

What kind ofnon-public information do we collect about you if you become a fund shareholder?

If you apply to open an account directly with us, you will be giving us somenon-public information about yourself. Thenon-public information we collect about you is:

●  Information you give us on your application form.This could include your name, address, telephonenumber, social security number, bank account number, and other information.

●  Information about your transactions with us, any transactions with our affiliates, and transactions with the entities we hire to provide services to you.This would include information about the shares thatyou buy or redeem. If we hire someone else to provide services — like a transfer agent — we will also have information about the transactions that you conduct through them.

What information do we disclose and to whom do we disclose it?

We do not disclose anynon-public personal information about our customers or former customers to anyone other than our affiliates, our service providers who need to know such information, and as otherwise permitted by law. If you want to find out what the law permits, you can read the privacy rules adopted by the Securities and Exchange Commission. They are in volume 17 of the Code of Federal Regulations, Part 248. The Commission often posts information about its regulations on its website, www.sec.gov.

What do we do to protect your personal information?

We restrict access tonon-public personal information about you to the people who need to know that information in order to provide services to you or the fund and to ensure that we are complying with the laws governing the securities business. We maintain physical, electronic, and procedural safeguards to keep your personal information confidential.

THE GABELLI GLOBAL RISING INCOME AND DIVIDEND FUND

One Corporate Center

Rye, NY 10580-1422

Portfolio Manager Biography

Mario J. Gabelli, CFA,is Chairman, Chief Executive Officer, and Chief Investment Officer - Value Portfolios ofGAMCO Investors, Inc. that he founded in 1977, and Chief Investment Officer - Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc. He is also Executive Chairman of Associated Capital Group, Inc. Mr. Gabelli is a summa cum laude graduate of Fordham University and holds an MBA degree from Columbia Business School and Honorary Doctorates from Fordham University and Roger Williams University.

2019 TAX NOTICE TO SHAREHOLDERS(Unaudited)

For the year ended December 31, 2019, the Fund paid to shareholders ordinary income distributions (comprised of net investment income) totaling $0.1484, $0.1367, $0.0641, and $0.3100 per share for Class AAA, Class A, Class C, and Class I Shares, respectively, and long term capital gains totaling $14,663, or the maximum allowable. For the year ended December 31, 2019, 59.85% of the ordinary income distribution qualifies for the dividends received deduction available to corporations. The Fund designates 100% of the ordinary income distribution as qualified dividend income pursuant to the Jobs and Growth Tax Relief Reconciliation Act of 2003. The Fund designates 1.05% of the ordinary income distribution as qualified interest income pursuant to the Tax Relief, Unemployment Reauthorization, and Job Creation Act of 2010. Also for the year 2019, the Fund passed through foreign tax credits of $0.0284, $0.0284, $0.0284, and $0.0284 per share to Class AAA, Class A, Class C, and Class I Shares, respectively.

U.S. Government Income:

The percentage of the ordinary income distribution paid by the Fund during the year ended December 31, 2019 which was derived from U.S. Treasury securities was 0.70%. Such income is exempt from state and local tax in all states. However, many states, including New York and California, allow a tax exemption for a portion of the income earned only if a mutual fund has invested at least 50% of its assets at the end of each quarter of the Fund’s fiscal year in U.S. Government securities. The Fund did not meet this strict requirement in 2019. The percentage of U.S. Government securities held as of December 31, 2019 was 2.93%. Due to the diversity in state and local tax law, it is recommended that you consult your personal tax adviser as to the applicability of the information provided to your specific situation.

All designations are based on financial information available as of the date of this annual report and, accordingly, are subject to change. For each item, it is the intention of the Fund to designate the maximum amount permitted under the Internal Revenue Code and the regulations thereunder.

We have separated the portfolio manager’s commentary from the financial statements and investment portfolio due to corporate governance regulations stipulated by the Sarbanes-Oxley Act of 2002. We have done this to ensure that the content of the portfolio manager’s commentary is unrestricted. Both the commentary and the financial statements, including the portfolio of investments, will be available on our website at www.gabelli.com.

GAMCO Global Series Funds, Inc.
THE GABELLI GLOBAL RISING INCOME
AND DIVIDEND FUND
One Corporate Center
Rye, New York 10580-1422
t 800-GABELLI(800-422-3554)
f 914-921-5118
e info@gabelli.com
GABELLI.com
Net Asset Value per share available daily by calling800-GABELLI after 7:00 P.M.
BOARD OF DIRECTORS Mario J. Gabelli, CFA Chairman and Chief Executive Officer, GAMCO Investors, Inc. Executive Chairman, Associated Capital Group, Inc. E. Val Cerutti Chief Executive Officer, Cerutti Consultants, Inc. Anthony J. Colavita President, Anthony J. Colavita, P.C. John D. Gabelli Senior Vice President, G.research, LLC Werner J. Roeder Former Medical Director, Lawrence Hospital Anthonie C. van Ekris Chairman, BALMAC International, Inc. Salvatore J. Zizza Chairman, Zizza & Associates Corp.	OFFICERS Bruce N. Alpert President John C. Ball Treasurer Agnes Mullady Vice President Andrea R. Mango Secretary Richard J. Walz Chief Compliance Officer DISTRIBUTOR G.distributors, LLC CUSTODIAN State Street Bank and Trust Company TRANSFER AGENT AND DIVIDEND DISBURSING AGENT DST Asset Manager Solutions, Inc. LEGAL COUNSEL Skadden, Arps, Slate, Meagher & Flom LLP
This report is submitted for the general information of the shareholders of The Gabelli Global Rising Income and Dividend Fund. It is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.
GAB441Q419AR

The Gabelli Global Mini Mites Fund

Annual Report — December 31, 2019

To Our Shareholders,

For the year ended December 31, 2019, the net asset value (NAV) per Class AAA Share of The Gabelli Global Mini Mites Fund increased 11.5% compared with an increase of 26.1% for the S&P Developed Small Cap Index. Other classes of shares are available. See page 2 for performance information for all classes.

Enclosed are the financial statements, including the schedule of investments, as of December 31, 2019.

Performance Discussion (Unaudited)

The Fund, a series of GAMCO Global Series Funds, Inc. commenced investment operations on October 1, 2018. The Fund is anon-diversified open end management investment company whose investment objective is to provide investors with long term capital appreciation by investing primarily in micro-capitalization equity securities.

The Fund’s investment strategy is to invest in common stocks of smaller companies that have a market capitalization (defined as shares outstanding times current market price) of $250 million or less at the time of the Fund’s initial investment. These companies are calledmicro-cap companies. As a “global” fund, the Fund invests in securities of issuers located in at least three countries and at least 40% of its net assets are invested in securities of non U.S. issuers.

The markets made it look easy in 2019. Stocks, bonds, oil and gold, all returned double-digits. Stocks advanced across market caps, geographies and sectors. The MSCI All Country World Index advanced +27%. The U.S. market outperformed developed international markets, which outperformed emerging markets. Large cap outperformed small cap. Growth outperformed value. Technology was a standout in 2019. The S&P 500 Information Technology sector gained +48%, a full 17 percentage points better than the next best sector, being Communication Services, which, surprise, surprise, is mostly technology stocks.

Selected holdings that contributed positively to performance in 2019 were: Communications Systems Inc. (3.6% of net assets as of December 31, 2019) provides physical connectivity infrastructure and services for global deployments of broadband networks. Revenues increased due to strong pipelines from federal and commercial clients; Avid Technology Inc. (3.3%) specializes in audio and video systems, video editing software, audio editing software, management and distribution services. Strong sales growth in subscription software and sequentially higher maintenance revenue increased performance; and Astec Industries, Inc. (1.9%) which manufactures specialized equipment for asphalt road building, aggregate processing, oil, gas and water well drilling and concrete production. The company is actively aligning the business to meet the current demand in addition; the international strategy will help in accelerating revenue growth.

Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (www.gabelli.com), and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. To elect to receive all future reports on paper free of charge, please contact your financial intermediary, or, if you invest directly with the Fund, you may call800-422-3554 or send an email request to info@gabelli.com.

Some of our weaker performing holdings during the year were: IntriCon Corp. (3.1%) is a designer, developer, manufacturer and distributor of miniature and micro miniature body worn devices. Added operating expenses and lower revenues negatively impacted profitability; Farmer Brothers Co. (3.0%) the company specializes in the manufacture and distribution of coffee, tea, and other food service items. Net sales and revenues both missed their respective consensus estimates; and Twin Disc Inc. (1.5%) designs, manufactures and distributes power transmission equipment for a wide range of applications. Continued operational challenges associated with manufacturing and supply chain issues, compounded by weak oil and gas environment, significantly impacted profitability.

Thank you for your investment in The Gabelli Global Mini Mites Fund.

We appreciate your confidence and trust.

Comparative Results

Average Annual Returns through December 31, 2019 (a) (Unaudited)

	1 Year		Since Inception (10/1/18)
Class AAA (GAMNX)		11.49%		(3.05)%
S&P Developed SmallCap Index		26.14		2.98
Class A (GMNAX)		11.47		(3.07)
With sales charge (b)		5.06		(7.56)
Class C (GMNCX)		10.83		(3.65)
With contingent deferred sales charge (c)		9.83		(3.65)
Class I (GGMMX )		11.84		(2.85)

In the current prospectuses dated April 30, 2019, as amended by the supplement dated December 3, 2019, the gross expense ratios for Class AAA, A, C, and I Shares are 44.14%, 44.14%, 44.89%, and 43.89%, respectively, and the net expense ratios for all share classes after contractual reimbursements by Gabelli Funds, LLC, (the Adviser) is 0.90%. See page 10 for the expense ratios for the year ended December 31, 2019. The contractual reimbursements are in effect through April 30, 2021. Class AAA and Class I Shares do not have a sales charge. The maximum sales charge for Class A Shares and Class C Shares is 5.75% and 1.00%, respectively.

(a) Returns represent past performance and do not guarantee future results. Total returns and average annual returns reflect changes in share price, reinvestment of distributions, and are net of expenses. Investment returns and the principal value of an investment will fluctuate. When shares are redeemed, they may be worth more or less than their original cost. Current performance may be lower or higher than the performance data presented. Visit www.gabelli.com for performance information as of the most recent month end. Returns would have been lower had the Adviser not reimbursed certain expenses of the Fund. The Fund imposes a 2% redemption fee on shares sold or exchanged within seven days of purchase. Investors should carefully consider the investment objectives, risks, charges, and expenses of the Fund before investing. The prospectuses contain information about these and other matters and should be read carefully before investing. To obtain a prospectus, please visit our website at www.gabelli.com.Investing in foreign securities involves risks not ordinarily associated with investments in domestic issues, including currencyfluctuation, economic, and political risks. The S&P Developed SmallCap Index is a float adjusted market capitalization weighted index designed to measure the equity market performance of small capitalization companies located in developed markets. The index is composed of companies within the bottom 15% of the cumulative market capitalization in developed markets. The index covers all publicly listed equities with float adjusted market values of U.S. $100 million or more and annual dollar value traded of at least U.S. $50 million in all included countries. You cannot invest directly in an index.

(b) Performance results include the effect of the maximum 5.75% sales charge at the beginning of the period.

(c) Assuming payment of the 1% maximum contingent deferred sales charge imposed on redemptions made within the period of purchase.

2

COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN

THE GABELLI GLOBAL MINI MITES FUND (CLASS AAA SHARES)

AND S&P DEVELOPED SMALLCAP INDEX (Unaudited)

* Past performance is not predictive of future results. The performance tables and graph do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares.

3

The Gabelli Global Mini Mites Fund

Disclosure of Fund Expenses (Unaudited)

For the Six Month Period from July 1, 2019 through December 31, 2019 Expense Table

We believe it is important for you to understand the impact of fees and expenses regarding your investment. All mutual funds have operating expenses. As a shareholder of a fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund’s gross income, directly reduce the investment return of a fund. When a fund’s expenses are expressed as a percentage of its average net assets, this figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your Fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The Expense Table below illustrates your Fund’s costs in two ways:

Actual Fund Return:This section provides informationabout actual account values and actual expenses. You may use this section to help you to estimate the actual expenses that you paid over the period after any fee waivers and expense reimbursements. The “Ending Account Value” shown is derived from the Fund’sactualreturn during the past period, and the “ExpensesPaid During Period” shows the dollar amount that would have been paid by an investor who started with $1,000 in the Fund. You may use this information, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your Fund under the heading “Expenses Paid During Period” to estimate the expenses you paid during this period.

Hypothetical 5% Return:This section providesinformation about hypothetical account values and hypothetical expenses based on the Fund’s actual expense

ratio. It assumes a hypothetical annualized return of 5% before expenses during the period shown. In this case – because the hypothetical return used isnot the Fund’s actual return – the results do not apply to your investment and you cannot use the hypothetical account value and expense to estimate the actual ending account balance or expenses you paid for the period. This example is useful in making comparisons of the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs such as sales charges (loads), redemption fees, or exchange fees, if any, which are described in the Prospectus. If these costs were applied to your account, your costs would be higher. Therefore, the 5% hypothetical return is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. The “Annualized Expense Ratio” represents the actual expenses for the last six months and may be different from the expense ratio in the Financial Highlights which is for the year ended December 31, 2019.

	Beginning Account Value 07/01/19	Ending Account Value 12/31/19	Annualized Expense Ratio	Expenses Paid During Period*
The Gabelli Global Mini Mites
Actual Fund Return
Class AAA	$1,000.00	$1,035.60	1.21%	$6.21
Class A	$1,000.00	$1,036.50	1.21%	$6.21
Class C	$1,000.00	$1,032.80	1.83%	$9.38
Class I	$1,000.00	$1,037.60	1.00%	$5.14
Hypothetical 5% Return
Class AAA	$1,000.00	$1,019.11	1.21%	$6.16
Class A	$1,000.00	$1,019.11	1.21%	$6.16
Class C	$1,000.00	$1,015.98	1.83%	$9.30
Class I	$1,000.00	$1,020.16	1.00%	$5.09

* Expenses are equal to the Fund’s annualized expense ratio for the last six months multiplied by the average account value over the period, multiplied by the number of days in the most recent fiscal half year (184 days), then divided by 365.

4

Summary of Portfolio Holdings (Unaudited)

The following table presents portfolio holdings as a percent of net assets as of December 31, 2019:

The Gabelli Global Mini Mites Fund

Long Positions
Telecommunications	10.8	%
Hotels and Gaming	9.0	%
Health Care	8.7	%
Computer Software and Services	8.6	%
Automotive: Parts and Accessories	8.0	%
Business Services	5.6	%
Machinery	5.6	%
Diversified Industrial	5.3	%
Paper and Forest Products	4.8	%
Aerospace and Defense	4.7	%
Food and Beverage	3.9	%
Entertainment	3.8	%

Specialty Chemicals	2.8	%
Energy and Utilities	2.7	%
Real Estate	2.5	%
Equipment and Supplies	2.1	%
Consumer Products	1.8	%
Broadcasting	1.7	%
Building and Construction	1.7	%
Financials	0.8	%
Financial Services	0.7	%
Retail	0.2	%
Other Assets and Liabilities (Net)	4.2	%
	100.0	%

The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission (the SEC) for the first and third quarters of each fiscal year on FormN-PORT. Shareholders may obtain this information at www.gabelli.com or by calling the Fund at800-GABELLI(800-422-3554). The Fund’s FormN-PORT is available on the SEC’s website at www.sec.gov and may also be reviewed and copied at the SEC’s Public Reference Room in Washington, DC. Information on the operation of the Public Reference Room may be obtained by calling800-SEC-0330.

Proxy Voting

The Fund files FormN-PX with its complete proxy voting record for the twelve months ended June 30, no later than August 31 of each year. A description of the Fund’s proxy voting policies, procedures, and how the Fund voted proxies relating to portfolio securities is available without charge, upon request, by (i) calling800-GABELLI(800-422-3554); (ii) writing to The Gabelli Funds at One Corporate Center, Rye, NY 10580-1422; or (iii) visiting the SEC’s website at www.sec.gov.pgss

5

The Gabelli Global Mini Mites Fund

Schedule of Investments — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS — 95.8%
		Aerospace and Defense — 4.7%
	2,500	Avio SpA	$	33,379	$	38,867
	17,500	Cobham plc		36,490		38,074
	800	CPI Aerostructures Inc.†		6,251		5,384
				76,120		82,325
		Automotive: Parts and Accessories — 8.0%
	63,000	Opus Group AB		51,180		56,500
	400	Smart Eye AB†		4,227		5,039
	1,200	Strattec Security Corp.		36,941		26,652
	5,700	Uni-Select Inc.		59,938		49,997
				152,286		138,188
		Broadcasting — 1.7%
	3,000	Beasley Broadcast Group Inc., Cl. A		12,406		9,270
	5,000	Corus Entertainment Inc., Cl. B		24,179		20,484
				36,585		29,754
		Building and Construction — 1.7%
	4,000	Armstrong Flooring Inc.†		16,717		17,080
	1,000	Gencor Industries Inc.†		12,340		11,670
				29,057		28,750
		Business Services — 5.6%
	400	Data Respons ASA		2,143		2,182
	7,000	Diebold Nixdorf Inc.†		48,929		73,920
	7,000	Internap Corp.†		23,068		7,700
	2,200	MoneyGram International Inc.†		5,551		4,620
	7,000	Trans-Lux Corp.†		4,174		2,275
	3,000	VersaPay Corp.†		6,111		6,192
				89,976		96,889
		Computer Software and Services — 8.6%
	5,000	Alithya Group Inc., Cl. A†		17,069		14,100
	1,200	Asetek A/S†		4,635		4,237
	6,700	Avid Technology Inc.†		33,196		57,486
	5,000	GTY Technology Holdings Inc.†		32,349		29,450
	70,000	Pacific Online Ltd.		14,777		15,631
	8,500	RumbleON Inc., Cl. B†		36,947		7,018
	3,000	Sophos Group plc		22,211		22,174
				161,184		150,096
		Consumer Products — 1.8%
	1,200	Lifetime Brands Inc.		11,945		8,340
	500	Nobility Homes Inc.		11,100		12,000
	71,000	Playmates Holdings Ltd.		10,621		10,934
				33,666		31,274
		Diversified Industrial — 5.3%
	7,000	Ampco-Pittsburgh Corp.†		24,660		21,070
	2,000	Core Molding Technologies Inc.†		10,245		6,500
	31,000	Fluence Corp. Ltd.†		7,941		9,354
	268	Graham Corp.		5,291		5,864
	300	Lawson Products Inc.†		9,486		15,630

Shares			Cost		Market Value
	2,000	Myers Industries Inc.	$	33,244	$	33,360
				90,867		91,778
		Energy and Utilities — 2.7%
	2,000	KLX Energy Services Holdings Inc.†		10,991		12,880
	3,600	Mitcham Industries Inc.†		13,914		10,332
	5,000	PNE AG		22,128		22,546
	62	Weatherford International plc†		6,593		1,733
				53,626		47,491
		Entertainment — 3.8%
	1,500	Cineplex Inc.		38,782		39,101
	2,018	Reading International Inc., Cl. A†		28,194		22,581
	100	Xilam Animation SA†		4,332		4,980
				71,308		66,662
		Equipment and Supplies — 2.1%
	1,200	The Eastern Co.		30,931		36,636
		Financial Services — 0.7%
	1,000	Steel Partners Holdings LP†		14,504		12,102
		Financials — 0.8%
	600	BKF Capital Group Inc.†		6,962		7,050
	4,000	Harwood Wealth Management Group plc		7,492		7,683
				14,454		14,733
		Food and Beverage — 3.9%
	3,500	Farmer Brothers Co.†		63,035		52,710
	200	Nathan’s Famous Inc.		13,034		14,176
				76,069		66,886
		Health Care — 8.7%
	60,000	Achaogen Inc.†		12,750		600
	300	Consort Medical plc		4,085		4,073
	400	Cutera Inc.†		5,603		14,324
	3,000	IntriCon Corp.†		66,367		54,000
	1,900	IRRAS AB†		4,898		4,747
	5,000	National Veterinary Care Ltd.		12,389		12,702
	4,000	Oncimmune Holdings plc†		4,931		2,040
	7,000	Option Care Health Inc.†		17,134		26,110
	3,200	Owens & Minor Inc.		14,704		16,544
	2,200	Paratek Pharmaceuticals Inc.†		17,418		8,866
	1,300	Tristel plc		4,856		6,630
				165,135		150,636
		Hotels and Gaming — 9.0%
	2,200	Canterbury Park Holding Corp.		30,370		27,280
	4,000	Cherry AB, Cl. B†(a)		38,859		37,154
	19,751	Dover Motorsports Inc.		42,852		36,737
	5,500	Full House Resorts Inc.†		13,392		18,425
	2,000	Gamenet Group SpA		28,767		29,164
	1,000	Inspired Entertainment Inc.†		5,140		6,750
				159,380		155,510

See accompanying notes to financial statements.

6

The Gabelli Global Mini Mites Fund

Schedule of Investments (Continued) — December 31, 2019

Shares			Cost		Market Value
		COMMON STOCKS (Continued)
		Machinery — 5.6%
	800	Astec Industries Inc.	$	25,919	$	33,600
	1,300	L.B. Foster Co., Cl. A†		26,228		25,194
	2,000	The L.S. Starrett Co., Cl. A†		11,568		11,440
	2,400	Twin Disc Inc.†		31,851		26,448
				95,566		96,682
		Paper and Forest Products — 4.8%
	9,000	Canfor Corp.†		95,947		84,140
		Real Estate — 2.5%
	7,400	Atrium European Real Estate Ltd.		30,534		28,637
	5,000	Trinity Place Holdings Inc.†		18,000		15,050
				48,534		43,687
		Retail — 0.2%
	1,800	Tuesday Morning Corp.†		3,526		3,330
		Specialty Chemicals — 2.8%
	8,000	Treatt plc		43,363		48,746
		Telecommunications — 10.8%
	700	Bittium Oyj		4,945		5,104
	10,200	Communications Systems Inc.		42,853		62,934
	5,000	Consolidated Communications Holdings Inc.		18,143		19,400
	5,300	EXFO Inc.†		18,435		24,592
	5,000	HC2 Holdings Inc.†		18,419		10,850
	22,877	NII Holdings Inc.†		42,645		49,643
	800	Nuvera Communications Inc.		14,463		15,200
				159,903		187,723
		TOTAL COMMON STOCKS		1,701,987		1,664,018

Shares			Cost		Market Value
		WARRANTS — 0.0%
		Energy and Utilities — 0.0%
	693	Weatherford International plc, expire 11/26/23†(a)	$	0	$	0
		TOTAL INVESTMENTS — 95.8%	$	1,701,987		1,664,018
		Other Assets and Liabilities (Net) — 4.2%				73,555
		NET ASSETS — 100.0%			$	1,737,573

(a) Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

† Non-income producing security.

Geographic Diversification	% of Market Value			Market Value
United States		61.1	%	$	1,015,835
Europe		22.2			370,311
Canada		14.3			238,606
Asia/Pacific		2.4			39,266
		100.0	%	$	1,664,018

See accompanying notes to financial statements.

7

The Gabelli Global Mini Mites Fund

Statement of Assets and Liabilities

December 31, 2019

Assets:
Investments, at value (cost $1,701,987)	$	1,664,018
Foreign currency, at value (cost $1,115)		1,121
Cash		72,543
Receivable for investments sold		3,398
Receivable for Fund shares sold		623
Receivable from Adviser		16,433
Dividends and interest receivable		1,330
Prepaid expenses		27,032
Total Assets		1,786,498
Liabilities:
Payable for investment advisory fees		2,812
Payable for distribution fees		34
Payable for legal and audit fees		27,800
Payable for shareholder communications expenses		11,314
Payable for shareholder services fees		2,912
Other accrued expenses		4,053
Total Liabilities		48,925
Net Assets (applicable to 187,650 shares outstanding)	$	1,737,573
Net Assets Consist of:
Paid-in capital	$	1,782,101
Total accumulated loss		(44,528	)
Net Assets	$	1,737,573
Shares of Capital Stock, each at $0.001 par value:
Class AAA:
Net Asset Value, offering, and redemption price per share ($113,862 ÷ 12,296 shares outstanding; 75,000,000 shares authorized)	$	9.26
Class A:
Net Asset Value and redemption price per share ($9,614 ÷ 1,038.6 shares outstanding; 50,000,000 shares authorized)	$	9.26
Maximum offering price per share (NAV ÷ 0.9425, based on maximum sales charge of 5.75% of the offering price)	$	9.82
Class C:
Net Asset Value and offering price per share ($9,543 ÷ 1,034 shares outstanding; 25,000,000 shares authorized)	$	9.23	(a)
Class I:
Net Asset Value, offering, and redemption price per share ($1,604,554 ÷ 173,281 shares outstanding; 25,000,000 shares authorized)	$	9.26

(a) Redemption price varies based on the length of time held.

Statement of Operations

For the Year Ended December 31, 2019

Investment Income:
Dividends (net of foreign withholding taxes of $332)	$	23,576
Interest		703
Total Investment Income		24,279
Expenses:
Investment advisory fees		13,238
Distribution fees - Class AAA		244
Distribution fees - Class A		23
Distribution fees - Class C		93
Legal and audit fees		37,864
Registration expenses		36,948
Shareholder communications expenses		23,470
Shareholder services fees		10,987
Custodian fees		6,476
Directors’ fees		304
Interest expense		160
Miscellaneous expenses		10,358
Total Expenses		140,165
Less:
Expense reimbursements (See Note 3)		(126,588	)
Net Expenses		13,577
Net Investment Income		10,702
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency:
Net realized gain on investments		49,568
Net realized loss on foreign currency transactions		(883	)
Net realized gain on investments and foreign currency transactions		48,685
Net change in unrealized appreciation/depreciation: on investments		31,762
on foreign currency translations		10
Net change in unrealized appreciation/depreciation on investments and foreign currency translations		31,772
Net Realized and Unrealized Gain/(Loss) on Investments and Foreign Currency		80,457
Net Increase in Net Assets Resulting from Operations	$	91,159

See accompanying notes to financial statements.

8

The Gabelli Global Mini Mites Fund

Statement of Changes in Net Assets

	Year Ended				Period Ended
	December 31, 2019				December 31, 2018(a)
Operations:
Net investment income		$	10,702			$	708
Net realized gain on investments and foreign currency transactions			48,685				17
Net change in unrealized appreciation/depreciation on investments and foreign currency translations			31,772				(69,731	)
Net Increase/(Decrease) in Net Assets Resulting from Operations			91,159				(69,006	)
Distributions to Shareholders:
Accumulated earnings
Class AAA			(4,122	)			(73	)
Class A			(351	)			(9	)
Class C			(305	)			(3	)
Class I			(61,048	)			(824	)
Total Distributions to Shareholders			(65,826	)			(909	)
Capital Share Transactions:
Class AAA			38,276				80,514
Class A			351				10,003
Class C			305				10,009
Class I			1,092,568				550,129
Net Increase in Net Assets from Capital Share Transactions			1,131,500				650,655
Net Increase in Net Assets			1,156,833				580,740
Net Assets:
Beginning of period			580,740				—
End of period		$	1,737,573			$	580,740

(a) The Fund commenced investment operations on October 1, 2018.

See accompanying notes to financial statements.

9

The Gabelli Global Mini Mites Fund

Financial Highlights

Selected data for a share of capital stock outstanding throughout the period:

			Income (Loss) from Investment Operations									Distributions														Ratios to Average Net Assets/ Supplemental Data
Period Ended December 31	Net Asset Value, Beginning of Period		Net Investment Income (Loss)(a)			Net Realized and Unrealized Gain (Loss) on Investments			Total from Investment Operations			Net Investment Income			Net Realized Gain			Total Distributions			Net Asset Value, End of Period		Total Return†			Net Assets End of Period (in 000’s)		Net Investment Income (Loss)			Operating Expenses Before Reimbursement			Operating Expenses Net of Reimbursement(c)			Portfolio Turnover Rate
Class AAA
2019	$	8.62	$	0.05			$   0.94		$	0.99		$	(0.04	)	$	(0.31	)		$(0.35	)	$	9.26		11.5	%		$   114		0.53	%		10.81	%		1.23	%(d)		131	%
2018(e)		10.00		0.01			(1.38	)		(1.37	)		(0.01	)		(0.00	)(b)		(0.01	)		8.62		(13.7	)		70		0.45	(f)		44.14	(f)		1.25	(f)		6
Class A
2019	$	8.62	$	0.04			$   0.95		$	0.99		$	(0.04	)	$	(0.31	)		$(0.35	)	$	9.26		11.5	%		$     10		0.43	%		10.81	%		1.23	%(d)		131	%
2018(e)		10.00		0.01			(1.38	)		(1.37	)		(0.01	)		(0.00	)(b)		(0.01	)		8.62		(13.7	)		9		0.41	(f)		44.14	(f)		1.25	(f)		6
Class C
2019	$	8.61	$	(0.02	)		$   0.95		$	0.93		$	(0.00	)(b)	$	(0.31	)		$(0.31	)	$	9.23		10.8	%		$       9		(0.25	)%		11.56	%		1.92	%(d)		131	%
2018(e)		10.00		(0.01	)		(1.38	)		(1.39	)		—			(0.00	)(b)		(0.00	)		8.61		(13.9	)		8		(0.34	)(f)		44.89	(f)		2.00	(f)		6
Class I
2019	$	8.61	$	0.08			$   0.94		$	1.02		$	(0.06	)	$	(0.31	)		$(0.37	)	$	9.26		11.8	%		$1,605		0.84	%		10.56	%		1.00	%(d)		131	%
2018(e)		10.00		0.02			(1.40	)		(1.38	)		(0.01	)		(0.00	)(b)		(0.01	)		8.61		(13.8	)		494		0.79	(f)		43.89	(f)		1.00	(f)		6

† Total return represents aggregate total return of a hypothetical $1,000 investment at the beginning of the period and sold at the end of the period including reinvestment of distributions and does not reflect the applicable sales charges. Total return for a period of less than one year is not annualized.

(a) Per share amounts have been calculated using the average shares outstanding method.

(b) Amount represents less than $0.005 per share.

(c) Under an expense reimbursement agreement with the Adviser, the Adviser reimbursed expenses of $126,588 and $43,899 for the year ended December 31, 2019 and the period ended December 31, 2018, respectively.

(d) The Fund incurred interest expense for the year ended December 31, 2019. If interest expense had not been incurred, the ratio of operating expenses to average net assets would have been 1.22% for (Class AAA and Class A), 1.90% for (Class C) and 0.99% for (Class I).

(e) The Fund commenced investment operations on October 1, 2018.

(f) Annualized.

See accompanying notes to financial statements.

10

The Gabelli Global Mini Mites Fund

Notes to Financial Statements

1. Organization. The Gabelli Global Mini Mites Fund, a series of GAMCO Global Series Funds, Inc. (the Corporation),was incorporated on July 16, 1993 in Maryland. The Fund is anon-diversifiedopen-end management investment company registered under the Investment Company Act of 1940, as amended (the 1940 Act), and is one of five separately managed portfolios (collectively, the Portfolios) of the Corporation. The Fund’s primary objective is long term capital appreciation by investing primarily in micro-capitalization equity securities. The Fund commenced investment operations on October 1, 2018.

2. Significant Accounting Policies. As an investment company, the Fund follows the investment companyaccounting and reporting guidance, which is part of U.S. generally accepted accounting principles (GAAP) that may require the use of management estimates and assumptions in the preparation of its financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

New Accounting Pronouncements.To improve the effectiveness of fair value disclosure requirements, theFinancial Accounting Standards Board recently issued Accounting Standard Update (ASU)2018-13, Fair Value Measurement Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU2018-13), which adds, removes, and modifies certain aspects relating to fair value disclosure. ASU2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption of the additions relating to ASU2018-13 is not required, even if early adoption is elected for the removals and modifications under ASU2018-13. Management has early adopted the removals and modifications set forth in ASU2018-13 in these financial statements and has not early adopted the additions set forth in ASU2018-13.

Security Valuation.Portfolio securities listed or traded on a nationally recognized securities exchange or tradedin the U.S.over-the-counter market for which market quotations are readily available are valued at the last quoted sale price or a market’s official closing price as of the close of business on the day the securities are being valued. If there were no sales that day, the security is valued at the average of the closing bid and asked prices or, if there were no asked prices quoted on that day, then the security is valued at the closing bid price on that day. If no bid or asked prices are quoted on such day, the security is valued at the most recently available price or, if the Board of Directors (the Board) so determines, by such other method as the Board shall determine in good faith to reflect its fair market value. Portfolio securities traded on more than one national securities exchange or market are valued according to the broadest and most representative market, as determined by Gabelli Funds, LLC (the Adviser).

Portfolio securities primarily traded on a foreign market are generally valued at the preceding closing values of such securities on the relevant market, but may be fair valued pursuant to procedures established by the Board if market conditions change significantly after the close of the foreign market, but prior to the close of business on the day the securities are being valued. Debt obligations for which market quotations are readily available are valued at the average of the latest bid and asked prices. If there were no asked prices quoted on such day, the security is valued using the closing bid price. Such debt obligations are valued through prices provided by a pricing service approved by the Board. Certain securities are valued principally using dealer quotations.

Securities and assets for which market quotations are not readily available are fair valued as determined by the Board. Fair valuation methodologies and procedures may include, but are not limited to: analysis and review of available financial andnon-financial information about the company; comparisons with the valuation and

11

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

changes in valuation of similar securities, including a comparison of foreign securities with the equivalent U.S. dollar value American Depositary Receipt securities at the close of the U.S. exchange; and evaluation of any other information that could be indicative of the value of the security.

The Fund employs a fair value model to adjust prices to reflect events affecting the values of certain portfolio securities which occur between the close of trading on the principal market for such securities (foreign exchanges andover-the-counter markets) at the time when net asset values of the Fund are determined. If the Fund’s valuation committee believes that a particular event would materially affect net asset value, further adjustment is considered.

The inputs and valuation techniques used to measure fair value of the Fund’s investments are summarized into three levels as described in the hierarchy below:

● Level 1 — quoted prices in active markets for identical securities;

● Level 2 — other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.); and

● Level 3 — significant unobservable inputs (including the Board’s determinations as to the fair value of investments).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input both individually and in the aggregate that is significant to the fair value measurement. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. The summary of the Fund’s investments in securities by inputs used to value the Fund’s investments as of December 31, 2019 is as follows:

	Valuation Inputs
	Level 1 Quoted Prices			Level 2 Other Significant Observable Inputs			Level 3 Significant Unobservable Inputs			Total Market Value at 12/31/19
INVESTMENTS IN SECURITIES:
ASSETS (Market Value):
Common Stocks:
Business Services		$	94,614		$	2,275			—		$	96,889
Financials			7,683			7,050			—			14,733
Hotels and Gaming			118,356			—		$	37,154			155,510
Other Industries (a)			1,396,886			—			—			1,396,886
Total Common Stocks			1,617,539			9,325			37,154			1,664,018
Warrants (a)			—			—			0			0
TOTAL INVESTMENTS IN SECURITIES – ASSETS		$	1,617,539		$	9,325		$	37,154		$	1,664,018

(a) Please refer to the Schedule of Investments for the industry classifications of these portfolio holdings.

During the year ended December 31, 2019, the Fund did not have any transfers into or out of Level 3.

12

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

The following table reconciles Level 3 investments:

	Balance as of  12/31/18		Accrued discounts/ (premiums)		Realized gain/ (loss)		Net Change in unrealized appreciation/ depreciation†				Purchases			Sales		Transfers into Level 3††		Transfers out of Level 3††		Balance as of 12/31/19				Net change in unrealized appreciation/ depreciation during the period on Level 3 investments still held at 12/31/19†
INVESTMENTS IN SECURITIES:
ASSETS (Market Value):
Common Stocks (a)		—		—		—		$	(1,705	)		$	38,859		—		—		—		$	37,154			$	(1,705	)
Warrants (a)		—		—		—			—				0		—		—		—			0				0
TOTAL INVESTMENTS IN SECURITIES		—		—		—		$	(1,705	)		$	38,859		—		—		—		$	37,154(b	)		$	(1,705	)

(a) Please refer to the Schedule of Investments for the industry classifications of these portfolio holdings.

(b) The Level 3 common stock was valued at the announced price of the proposed merger transaction. The Level 3 warrants were valued at intrinsic value. The value of these securities at December 31, 2019 was $37,154. The inputs for the valuations of these securities were derived based on the judgement of the Adviser according to procedures approved by the Board of Directors.

† Net change in unrealized appreciation/depreciation on investments is included in the related amounts in the Statement of Operations.

†† The Fund’s policy is to recognize transfers into and out of Level 3 as of the beginning of the reporting period.

Additional Information to Evaluate Qualitative Information.

General.The Fund uses recognized industry pricing services – approved by the Board and unaffiliated withthe Adviser – to value most of its securities, and uses broker quotes provided by market makers of securities not valued by these and other recognized pricing sources. Several different pricing feeds are received to value domestic equity securities, international equity securities, preferred equity securities, and fixed income securities. The data within these feeds are ultimately sourced from major stock exchanges and trading systems where these securities trade. The prices supplied by external sources are checked by obtaining quotations or actual transaction prices from market participants. If a price obtained from the pricing source is deemed unreliable, prices will be sought from another pricing service or from a broker/dealer that trades that security or similar securities.

Fair Valuation.Fair valued securities may be common or preferred equities, warrants, options, rights, or fixedincome obligations. Where appropriate, Level 3 securities are those for which market quotations are not available, such as securities not traded for several days, or for which current bids are not available, or which are restricted as to transfer. Among the factors to be considered to fair value a security are recent prices of comparable securities that are publicly traded, reliable prices of securities not publicly traded, the use of valuation models, current analyst reports, valuing the income or cash flow of the issuer, or cost if the preceding factors do not apply. The circumstances of Level 3 securities are frequently monitored to determine if fair valuation measures continue to apply.

The Adviser reports quarterly to the Board the results of the application of fair valuation policies and procedures. These may include backtesting the prices realized in subsequent trades of these fair valued securities to fair values previously recognized.

13

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

Foreign Currency Translations.The books and records of the Fund are maintained in U.S. dollars. Foreigncurrencies, investments, and other assets and liabilities are translated into U.S. dollars at current exchange rates. Purchases and sales of investment securities, income, and expenses are translated at the exchange rate prevailing on the respective dates of such transactions. Unrealized gains and losses that result from changes in foreign exchange rates and/or changes in market prices of securities have been included in unrealized appreciation/depreciation on investments and foreign currency translations. Net realized foreign currency gains and losses resulting from changes in exchange rates include foreign currency gains and losses between trade date and settlement date on investment securities transactions, foreign currency transactions, and the difference between the amounts of interest and dividends recorded on the books of the Fund and the amounts actually received. The portion of foreign currency gains and losses related to fluctuation in exchange rates between the initial purchase trade date and subsequent sale trade date is included in realized gain/(loss) on investments.

Foreign Securities.The Fund may directly purchase securities of foreign issuers. Investing in securities offoreign issuers involves special risks not typically associated with investing in securities of U.S. issuers. The risks include possible revaluation of currencies, the inability to repatriate funds, less complete financial information about companies, and possible future adverse political and economic developments. Moreover, securities of many foreign issuers and their markets may be less liquid and their prices more volatile than securities of comparable U.S. issuers.

Foreign Taxes.The Fund may be subject to foreign taxes on income, gains on investments, or currency repatriation,a portion of which may be recoverable. The Fund will accrue such taxes and recoveries as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Restricted Securities.The Fund may invest up to 15% of its net assets in securities for which the marketsare restricted. Restricted securities include securities whose disposition is subject to substantial legal or contractual restrictions. The sale of restricted securities often requires more time and results in higher brokerage charges or dealer discounts and other selling expenses than does the sale of securities eligible for trading on national securities exchanges or in theover-the-counter markets. Restricted securities may sell at a price lower than similar securities that are not subject to restrictions on resale. Securities freely saleable among qualified institutional investors under special rules adopted by the SEC may be treated as liquid if they satisfy liquidity standards established by the Board. The continued liquidity of such securities is not as well assured as that of publicly traded securities, and accordingly the Board will monitor their liquidity. As of December 31, 2019, the Fund did not hold any restricted securities.

Securities Transactions and Investment Income.Securities transactions are accounted for on the trade datewith realized gain or loss on investments determined by using the identified cost method. Interest income (including amortization of premium and accretion of discount) is recorded on an accrual basis. Premiums and discounts on debt securities are amortized using the effective yield to maturity method. Dividend income is recorded on theex-dividend date, except for certain dividends from foreign securities that are recorded as soon after theex-dividend date as the Fund becomes aware of such dividends.

Determination of Net Asset Value and Calculation of Expenses.Certain administrative expenses are commonto, and allocated among, various affiliated funds. Such allocations are made on the basis of each fund’s average net assets or other criteria directly affecting the expenses as determined by the Adviser pursuant to procedures established by the Board.

14

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

In calculating the NAV per share of each class, investment income, realized and unrealized gains and losses, redemption fees, and expenses other than class specific expenses are allocated daily to each class of shares based upon the proportion of net assets of each class at the beginning of each day. Distribution expenses are borne solely by the class incurring the expense.

Distributions to Shareholders.Distributions to shareholders are recorded on theex-dividend date. Distributionsto shareholders are based on income and capital gains as determined in accordance with federal income tax regulations, which may differ from income and capital gains as determined under GAAP. These differences are primarily due to differing treatments of income and gains on various investment securities and foreign currency transactions held by the Fund, timing differences, and differing characterizations of distributions made by the Fund. Distributions from net investment income for federal income tax purposes include net realized gains on foreign currency transactions. These book/tax differences are either temporary or permanent in nature. To the extent these differences are permanent, adjustments are made to the appropriate capital accounts in the period when the differences arise. Permanent differences were primarily due to reclasses of net realized foreign currency gains and losses and redesignation of dividends paid. These reclassifications have no impact on the NAV of the Fund. For the year ended December 31, 2019, reclassifications were made to decreasepaid-in capital by $54, with an offsetting adjustment to total distributable earnings.

The tax character of distributions paid during the year ended December 31, 2019 and the period ended December 31, 2018 was as follows:

	Year Ended December 31, 2019		Period Ended December 31, 2018
Distributions paid from:
Ordinary income (inclusive of short term capital gains)		$65,826		$909
Total		$65,826		$909

Provision for Income Taxes.The Fund intends to continue to qualify as a regulated investment companyunder Subchapter M of the Internal Revenue Code of 1986, as amended (the Code). It is the policy of the Fund to comply with the requirements of the Code applicable to regulated investment companies and to distribute substantially all of its net investment company taxable income and net capital gains. Therefore, no provision for federal income taxes is required.

At December 31, 2019, the components of accumulated earnings/losses on a tax basis were as follows:

Undistributed ordinary income	$	353
Net unrealized depreciation on investments		(44,881	)
Total	$	(44,528	)

The Fund is permitted to carry capital losses forward for an unlimited period. Capital losses that are carried forward will retain their character as either short term or long term capital losses.

At December 31, 2019, the temporary difference between book basis and tax basis unrealized depreciation was primarily due to deferral of losses from wash sales for tax purposes andmark-to-market adjustments on investments in passive foreign investment companies.

15

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

The following summarizes the tax cost of investments and the related net unrealized depreciation at December 31, 2019:

	Cost	Gross Unrealized Appreciation	Gross Unrealized Depreciation	Net Unrealized Depreciation
Investments	$1,708,909	$163,596	$(208,487)	$(44,891)

The Fund is required to evaluate tax positions taken or expected to be taken in the course of preparing the Fund’s tax returns to determine whether the tax positions are“more-likely-than-not” of being sustained by the applicable tax authority. Income tax and related interest and penalties would be recognized by the Fund as tax expense in the Statement of Operations if the tax positions were deemed not to meet themore-likely-than-not threshold. During the year ended December 31, 2019, the Fund did not incur any income tax, interest, or penalties. As of December 31, 2019, the Adviser has reviewed all open tax years and concluded that there was no impact to the Fund’s net assets or results of operations. The Fund’s federal and state tax returns will remain subject to examination for three years. On an ongoing basis, the Adviser will monitor the Fund’s tax positions to determine if adjustments to this conclusion are necessary.

3. Investment Advisory Agreement and Other Transactions.The Fund has entered into an investmentadvisory agreement (the Advisory Agreement) with the Adviser which provides that the Fund will pay the Adviser a fee, computed daily and paid monthly, at the annual rate of 1.00% of the value of its average daily net assets. In accordance with the Advisory Agreement, the Adviser provides a continuous investment program for the Fund’s portfolio, oversees the administration of all aspects of the Fund’s business and affairs, and pays the compensation of all Officers and Directors of the Fund who are affiliated persons of the Adviser.

Through November 30, 2019, the Adviser had agreed to waive and/or to reimburse expenses of the Fund to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) at no more than an annual rate of 1.25%, 1.25%, 2.00%, and 1.00% of the value of the Fund’s average daily net assets for Class AAA, Class A, Class C, and Class I. Effective December 1, 2019, the Adviser amended its contractual agreement with respect to each share class of the Fund to waive its investment advisory fees and/or to reimburse expenses to the extent necessary to maintain the annualized total operating expenses of the Fund (excluding brokerage costs, acquired fund fees and expenses, interest, taxes, and extraordinary expenses) until at least April 30, 2021, at no more than 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. During the year ended December 31, 2019, the Adviser reimbursed the Fund in the amount of $126,588. In addition, the Fund has agreed, during the two year period following any waiver or reimbursement by the Adviser, to repay such amount to the extent, that after giving effect to the repayment, such adjusted annualized total operating expenses of the Fund would not exceed 0.90% of the value of the Fund’s average daily net assets for each share class of the Fund. The agreement is renewable annually. At December 31, 2019, the cumulative amount which the Fund may repay the Adviser, subject to the terms above, is $170,487:

For the period ended December 31, 2018, expiring December 31, 2020	$	43,899
For the year ended December 31, 2019, expiring December 31, 2021		126,588
	$	170,487

The Corporation pays each Director who is not considered to be an affiliated person an annual retainer of $6,000 plus $1,000 for each Board meeting attended and they are reimbursed for any out of pocket expenses incurred in attending meetings. All Board committee members receive $1,000 per meeting attended. The Chairman

16

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

of the Audit Committee receives an annual fee of $3,000, and the Lead Director receives an annual fee of $2,000. A Director may receive a single meeting fee, allocated among the participating funds, for attending certain meetings held on behalf of multiple funds. Directors who are directors or employees of the Adviser or an affiliated company receive no compensation or expense reimbursement from the Corporation.

4. Distribution Plan.The Fund’s Board has adopted a distribution plan (the Plan) for each class of shares,except for Class I Shares, pursuant to Rule12b-1 under the 1940 Act. Under the Class AAA, Class A, and Class C Share Plans, payments are authorized to G.distributors, LLC (the Distributor), an affiliate of the Adviser, at annual rates of 0.25%, 0.25%, and 1.00%, respectively, of the average daily net assets of those classes, the annual limitations under each Plan. Such payments are accrued daily and paid monthly.

5. Portfolio Securities.Purchases and sales of securities during the year ended December 31, 2019, otherthan short term securities and U.S. Government obligations, aggregated $2,900,688 and $1,718,849, respectively.

6. Transactions with Affiliates and Other Arrangements.During the year ended December 31, 2019, theFund paid brokerage commissions on security trades of $5,553 to G.research, LLC, an affiliate of the Adviser.

The cost of calculating the Fund’s NAV per share is a Fund expense pursuant to the Advisory Agreement. Under thesub-administration agreement with Bank of New York Mellon, the fees paid include the cost of calculating the Fund’s NAV. The Fund reimburses the Adviser for this service. During the year ended December 31, 2019, the Adviser did not seek reimbursements for this expense.

7. Line of Credit.The Fund participates in an unsecured line of credit which expires on March 4, 2020 andmay be renewed annually, of up to $75,000,000 under which it may borrow up to 10% of its net assets from the custodian for temporary borrowing purposes. Borrowings under this arrangement bear interest at a floating rate equal to the higher of the overnight Federal Funds rate plus 125 basis points or the 30 day ICE LIBOR plus 125 basis points in effect on that day. This amount, if any, would be included in “Interest expense” in the Statement of Operations. At December 31, 2019, there were no borrowings outstanding under the line of credit.

The average daily amount of borrowings outstanding under the lines of credit during the year ended December 31, 2019 was $12,934 with a weighted average interest rate of 3.51%. The maximum amount borrowed at anytime during the year ended December 31, 2019 was $294,000.

8. Capital Stock.The Fund offers four classes of shares–Class AAA Shares, Class A Shares, Class C Shares,and Class I Shares. Class AAA and Class I Shares are offered without a sales charge. Class A Shares are subject to a maximumfront-end sales charge of 5.75% and Class C Shares are subject to a 1.00% contingent deferred sales charge for the period after purchase.

The Fund imposes a redemption fee of 2.00% on all classes of shares that are redeemed or exchanged on or before the seventh day after the date of a purchase. The redemption fee is deducted from the proceeds otherwise payable to the redeeming shareholders and is retained by the Fund as an increase inpaid-in capital. The redemption fees retained by the Fund during the year ended December 31, 2019 and the period ended December 31, 2018, if any, can be found in the Statement of Changes in Net Assets under Redemption Fees.

17

The Gabelli Global Mini Mites Fund

Notes to Financial Statements (Continued)

Transactions in shares of capital stock were as follows:

	Year Ended December 31, 2019						Period Ended December 31, 2018(a)
	Shares			Amount			Shares			Amount
Class AAA
Shares sold		7,140		$	65,719			18,101		$	180,041
Shares issued upon reinvestment of distributions		448			4,122			9			73
Shares redeemed		(3,402	)		(31,565	)		(10,000	)		(99,600	)
Net increase		4,186		$	38,276			8,110		$	80,514
Class A
Shares sold		—			—			1,000		$	10,000
Shares issued upon reinvestment of distributions		39		$	351			0*			3
Net increase		39		$	351			1,000		$	10,003
Class C
Shares sold		—			—			1,000		$	10,000
Shares issued upon reinvestment of distributions		33		$	305			1			9
Net increase		33		$	305			1,001		$	10,009
Class I
Shares sold		133,571		$	1,256,583			57,223		$	549,305
Shares issued upon reinvestment of distributions		6,643			61,048			96			824
Shares redeemed		(24,252	)		(225,063	)		—			—
Net increase		115,962		$	1,092,568			57,319		$	550,129

* Represents fewer than 0.50 shares.

(a) The Fund commenced investment operations on October 1, 2018.

9. Significant Shareholder.As of December 31, 2019, approximately 68.1% of the Fund was beneficiallyowned by the Adviser and its affiliates, including managed accounts for which the affiliates of the Adviser have voting control but disclaim pecuniary interest.

10. Indemnifications.The Fund enters into contracts that contain a variety of indemnifications. The Fund’smaximum exposure under these arrangements is unknown. However, the Fund has not had prior claims or losses pursuant to these contracts. Management has reviewed the Fund’s existing contracts and expects the risk of loss to be remote.

11. Subsequent Events.Management has evaluated the impact on the Fund of all subsequent events occurringthrough the date the financial statements were issued and has determined that there were no other subsequent events requiring recognition or disclosure in the financial statements.

18

The Gabelli Global Mini Mites Fund

Report of Independent Registered Public Accounting Firm

To the Shareholders of The Gabelli Global Mini Mites Fund

and the Board of Directors of GAMCO Global Series Funds, Inc.

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities of The Gabelli Global Mini Mites Fund (the “Fund”) (one of the funds constituting GAMCO Global Series Funds, Inc. (the “Corporation”)), including the schedule of investments, as of December 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets and the financial highlights for the year ended December 31, 2019 and the period from October 1, 2018 (commencement of operations) through December 31, 2018 and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund (one of the funds constituting GAMCO Global Series Funds, Inc.) at December 31, 2019, the results of its operations for the year then ended, the changes in its net assets and its financial highlights for the year ended December 31, 2019 and the period from October 1, 2018 (commencement of operations) through December 31, 2018, in conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Corporation’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Corporation in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Corporation is not required to have, nor were we engaged to perform, an audit of the Corporation’s internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Corporation’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of December 31, 2019, by correspondence with the custodian. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the auditor of one or more Gabelli/GAMCO Funds investment companies since 1992.

Philadelphia, Pennsylvania

February 27, 2020

19

The Gabelli Global Mini Mites Fund

Board Consideration and Re-Approval of Investment Advisory Agreement (Unaudited)

During the six months ended December 31, 2019, the Board of Directors of the Corporation approved the continuation of the investment advisory agreement with the Adviser for the Fund on the basis of the recommendation by the directors (the Independent Board Members) who are not interested persons of the Fund. The following paragraphs summarize the material information and factors considered by the Independent Board Members as well as their conclusions relative to such factors.

Nature, Extent, and Quality of Services.The Independent Board Members considered information regardingthe portfolio managers, the depth of the analyst pool available to the Adviser and the Fund’s portfolio managers, the scope of supervisory, administrative, shareholder and other services supervised or provided by the Adviser and the absence of significant service problems reported to the Board. The Independent Board Members noted the experience, length of service and reputation of the Fund’s portfolio managers.

Investment Performance.The Independent Board Members reviewed the short term performance of the Fund(as of September 30, 2019) against a peer group of eight other comparable funds prepared by the Adviser (the Adviser Peer Group), and against a peer group prepared by Broadridge (the Broadridge Performance Peer Group) consisting of all retail and institutional global small/mid cap fund, regardless of asset size or primary channel of distribution, as represented by the Lipper Global Small/Mid Cap Index. The Independent Board Members noted that the Fund’s performance was in the fourth (lowest) quartile for the one year period, as measured against the Adviser Peer Group. Against the Broadridge Performance Peer Group, the Independent Board Members noted that the Fund’s performance was in the fourth quintile for the one year period.

Profitability.The Independent Board Members reviewed summary data regarding the profitability of the Fundto the Adviser both with a pro rata administrative overhead charge and with a stand alone administrative charge and noted the effect of the expense limitation agreement. The Independent Board Members also noted that a portion of the Fund’s portfolio transactions were executed by an affiliated broker of the Adviser and that another affiliated broker of the Adviser received distribution fees and minor amounts of sales commissions.

Economies of Scale.The Independent Board Members discussed the major elements of the Adviser’s coststructure, the relationship of those elements to potential economies of scale and reviewed data provided by the Adviser.

Sharing of Economies of Scale.The Independent Board Members noted that the investment managementfee schedule for the Fund does not take into account any potential economies of scale that may develop.

Service and Cost Comparisons.The Independent Board Members compared the expense ratios of the investmentmanagement fee, other expenses and total expenses of the Fund to similar expense ratios of the Adviser Peer Group and a peer group of eight other global small/mid cap funds selected by Broadridge (the Broadridge Expense Peer Group), and noted that the Adviser’s management fee includes substantially all administrative services of the Fund as well as investment advisory services. The Independent Board Members noted the effect of the expense limitation agreement in place for the Fund. The Independent Board Members noted that the Fund’s total expense ratio was the third lowest for the Adviser Peer Group and the lowest for the Broadridge Expense Peer Group. The Independent Board Members also noted that the advisory fee structure was the same as that in effect for most of the Gabelli funds. The Independent Board Members were presented with, but did not consider to be material to their decision, various information comparing the advisory fee to the fee for other types of accounts managed by the Adviser.

20

The Gabelli Global Mini Mites Fund

Board Consideration andRe-Approval of Investment Advisory Agreement (Unaudited) (Continued)

Conclusions.The Independent Board Members concluded that the Fund enjoyed highly experienced portfoliomanagement services, good ancillary services and did not have a favorable performance record. The Independent Board Members also concluded that the Fund’s expense ratios and profitability to the Adviser were reasonable, and that economies of scale were not a significant factor in their thinking at this time. The Board Members did not view the potential profitability of ancillary services as material to their decision. On the basis of the foregoing and without assigning particular weight to any single conclusion, the Independent Board Members determined to recommend continuation of the investment advisory agreement to the full Board.

Based on a consideration of all these factors in their totality, the Board Members, including all of the Independent Board Members, determined that the Fund’s advisory fee was fair and reasonable with respect to the quality of services provided and in light of the other factors described above that the Board deemed relevant. Accordingly, the Board Members determined to approve the continuation of each Fund’s Advisory Agreement. The Board Members based their decision on evaluations of all these factors as a whole and did not consider any one factor asall-important or controlling.

21

The Gabelli Global Mini Mites Fund

Additional Fund Information (Unaudited)

The business and affairs of the Fund are managed under the direction of the Corporation’s Board of Directors. Information pertaining to the Directors and officers of the Fund is set forth below. The Corporation’s Statement of Additional Information includes additional information about the Fund’s Directors and is available without charge, upon request, by calling800-GABELLI(800-422-3554) or by writing to The Gabelli Global Mini Mites Fund at One Corporate Center, Rye, NY 10580-1422.

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2		Number of Funds in Fund Complex Overseen by Director		Principal Occupation(s) During Past Five Years	Other Directorships Held by Director3
INTERESTED DIRECTORS4:
Mario J. Gabelli, CFA Director and Chief Investment Officer Age: 77		Since 1993		33	Chairman, Chief Executive Officer, and Chief Investment Officer– Value Portfolios of GAMCO Investors, Inc. and Chief Investment Officer– Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc.; Director/ Trustee or Chief Investment Officer of other registered investment companies within the Gabelli/GAMCO Fund Complex; Chief Executive Officer of GGCP, Inc.; Executive Chairman of Associated Capital Group, Inc.	Director of Morgan Group Holdings, Inc. (holding company) (2001-2019); Chairman of the Board and Chief Executive Officer of LICT Corp. (multimedia and communication services company); Director of CIBL, Inc. (broadcasting and wireless communications); Director of ICTC Group Inc. (communications) (2013-2018)
John D. Gabelli Director Age: 75		Since 1993		12	Senior Vice President of G.research, LLC	—
INDEPENDENT DIRECTORS5:
E. Val Cerutti Director Age: 80		Since 2001		7	Chief Executive Officer of Cerutti Consultants, Inc.	Director of The LGL Group, Inc. (diversified manufacturing) (1990-2009)
Anthony J. Colavita6 Director Age: 84		Since 1993		20	President of the law firm of Anthony J. Colavita, P.C.	—
Werner J. Roeder Director Age: 79		Since 1993		21	Retired physician; Former Vice President of Medical Affairs (Medical Director) of New York Presbyterian/Lawrence Hospital (1999-2014)	—
Anthonie C. van Ekris6 Director Age: 85		Since 1993		23	Chairman and Chief Executive Officer of BALMAC International, Inc. (global import/ export company)	—
Salvatore J. Zizza7 Director Age: 74		Since 2004		31	President of Zizza & Associates Corp. (private holding company); President of Bergen Cove Realty Inc.; Chairman of Harbor Diversified, Inc. (pharmaceuticals) (2009-2018); Chairman of BAM (semiconductor and aerospace manufacturing) (2000-2018); Chairman of Metropolitan Paper Recycling Inc. (recycling) (2005-2014)	Director and Chairman of Trans- Lux Corporation (business services); Director and Chairman of Harbor Diversified Inc. (pharmaceuticals) (2009-2018)

22

The Gabelli Global Mini Mites Fund

Additional Fund Information (Continued) (Unaudited)

Name, Position(s) Address1 and Age	Term of Office and Length of Time Served2		Principal Occupation(s) During Past Five Years
OFFICERS:
Bruce N. Alpert President Age: 68		Since 1993	Executive Vice President and Chief Operating Officer of Gabelli Funds, LLC since 1988; Officer of registered investment companies within the Gabelli/GAMCO Fund Complex; Senior Vice President of GAMCO Investors, Inc. since 2008
John C. Ball Treasurer Age: 43		Since 2017	Treasurer of funds within the Gabelli/GAMCO Fund Complex since 2017; Vice President and Assistant Treasurer of AMG Funds, 2014-2017; Vice President of State Street Corporation, 2007-2014
Agnes Mullady Vice President Age: 61		Since 2006	Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2006; President and Chief Operating Officer of the Fund Division of Gabelli Funds, LLC since 2015; Chief Executive Officer of G.distributors, LLC since 2010; Senior Vice President of GAMCO Investors, Inc. since 2009; Vice President of Gabelli Funds, LLC since 2007; Executive Vice President of Associated Capital Group, Inc. since 2016
Andrea R. Mango Secretary Age: 47		Since 2013	Vice President of GAMCO Investors, Inc. since 2016; Counsel of Gabelli Funds, LLC since 2013; Secretary of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013; Vice President ofclosed-end funds within the Gabelli/GAMCO Fund Complex since 2014
Richard J. Walz Chief Compliance Officer Age: 60		Since 2013	Chief Compliance Officer of registered investment companies within the Gabelli/GAMCO Fund Complex since 2013

¹ Address: One Corporate Center, Rye, NY 10580-1422, unless otherwise noted.

² Each Director will hold office for an indefinite term until the earliest of (i) the next meeting of shareholders, if any, called for the purpose of considering the election orre-election of such Director and until the election and qualification of his or her successor, if any, elected at such meeting, or (ii) the date a Director resigns or retires, or a Director is removed by the Board of Directors or shareholders, in accordance with the Corporation’sBy-Laws and Articles of Incorporation. For Officers, includes time served in other officer positions with the corporation. Each officer will hold office for an indefinite term until the date he or she resigns or retires or until his or her successor is elected and qualified.

³ This column includes only directorships of companies required to report to the SEC under the Securities Exchange Act of 1934, as amended, i.e., public companies, or other investment companies registered under the 1940 Act.

⁴ “Interested person” of the Corporation as defined in the 1940 Act. Messrs. Mario J. Gabelli and John D. Gabelli, who are brothers, are each considered an “interested person” because of their affiliation with Gabelli Funds, LLC which acts as the Corporation’s investment adviser.

⁵ Directors who are not interested persons are considered “Independent” Directors.

⁶ Mr. Colavita’s son, Anthony S. Colavita, serves as a director of other funds in the Gabelli/GAMCO Fund Complex. Mr. van Ekris is an independent director of Gabelli International Ltd., Gabelli Fund LDC, GAMA Capital Opportunities Master Ltd., and GAMCO International SICAV, all of which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and, in that event, would be deemed to be under common control with the Fund’s Adviser.

⁷ Mr. Zizza is an independent director of Gabelli International Ltd., which may be deemed to be controlled by Mario J. Gabelli and/or affiliates and in that event would be deemed to be under common control with the Fund’s Adviser. On September 9, 2015, Mr. Zizza entered into a settlement with the SEC to resolve an inquiry relating to an alleged violation regarding the making of false statements or omissions to the accountants of a company concerning a related party transaction. The company in question is not an affiliate of, nor has any connection to, the Fund. Under the terms of the settlement, Mr. Zizza, without admitting or denying the SEC’s findings and allegation, paid $150,000 and agreed to cease and desist committing or causing any future violations of Rule13b2-2 of the Securities Exchange Act of 1934, as amended. The Board has discussed this matter and has determined that it does not disqualify Mr. Zizza from serving as an Independent Director.

23

Gabelli/GAMCO Funds and Your Personal Privacy

Who are we?

The Gabelli/GAMCO Funds are investment companies registered with the Securities and Exchange Commission under the Investment Company Act of 1940. We are managed by Gabelli Funds, LLC, which is affiliated with GAMCO Investors, Inc., a publicly held company with subsidiaries and affiliates that provide investment advisory services for a variety of clients.

What kind ofnon-public information do we collect about you if you become a fund shareholder?

If you apply to open an account directly with us, you will be giving us somenon-public information about yourself. Thenon-public information we collect about you is:

● Information you give us on your application form.This could include your name, address, telephonenumber, social security number, bank account number, and other information.

● Information about your transactions with us, any transactions with our affiliates, and transactions with the entities we hire to provide services to you.This would include information about the shares thatyou buy or redeem. If we hire someone else to provide services — like a transfer agent — we will also have information about the transactions that you conduct through them.

What information do we disclose and to whom do we disclose it?

We do not disclose anynon-public personal information about our customers or former customers to anyone other than our affiliates, our service providers who need to know such information, and as otherwise permitted by law. If you want to find out what the law permits, you can read the privacy rules adopted by the Securities and Exchange Commission. They are in volume 17 of the Code of Federal Regulations, Part 248. The Commission often posts information about its regulations on its website, www.sec.gov.

What do we do to protect your personal information?

We restrict access tonon-public personal information about you to the people who need to know that information in order to provide services to you or the fund and to ensure that we are complying with the laws governing the securities business. We maintain physical, electronic, and procedural safeguards to keep your personal information confidential.

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THE GABELLI GLOBAL MINI MITES FUND

One Corporate Center

Rye, NY 10580-1422

Portfolio Management Team Biographies

Mario J. Gabelli, CFA,is Chairman, Chief Executive Officer, and Chief Investment Officer - Value Portfolios ofGAMCO Investors, Inc. that he founded in 1977, and Chief Investment Officer - Value Portfolios of Gabelli Funds, LLC and GAMCO Asset Management Inc. He is also Executive Chairman of Associated Capital Group, Inc. Mr. Gabelli is a summa cum laude graduate of Fordham University and holds an MBA degree from Columbia Business School and Honorary Doctorates from Fordham University and Roger Williams University.

Sarah Donnellyjoined Gabelli in 1999 as a junior research analyst working with the consumer staples and mediaanalysts. Currently she is a portfolio manager of Gabelli Funds, LLC, a Senior Vice President, and the Food, Household, and Personal Care products research analyst for Gabelli & Company. In 2013, she was named the Health & Wellness research platform leader. Ms. Donnelly received a BS in Business Administration with a concentration in Finance and minor in History from Fordham University.

Ashish Sinhajoined GAMCO UK in 2012 as a research analyst. Prior to joining the Firm, Mr. Sinha was a researchanalyst at Morgan Stanley in London for seven years and has covered European Technology,Mid-Caps and Business Services. He also worked in planning and strategy at Birla Sun Life Insurance in India. Currently Mr. Sinha is a portfolio manager of Gabelli Funds, LLC and an Assistant Vice President of GAMCO Asset Management UK. Mr. Sinha has a BSBA degree from the Institute of Management Studies and an MB from IIFT.

Hendi Susantojoined Gabelli in 2007 as the lead technology research analyst. He spent his early career in supplychain management consulting and operations in the technology industry. He currently is a portfolio manager of Gabelli Funds, LLC and a Vice President of Associated Capital Group Inc. Mr. Susanto received a BS degree summa cum laude from the University of Minnesota, an MS from M.I.T., and an MBA from the Wharton School of Business.

Chong-Min Kangjoined the Gabelli in 2007 as a research analyst. He currently is a portfolio manager of GabelliFunds, LLC and a Senior Vice President of GAMCO Investors Inc. Mr. Kang received a BA degree from Boston College and an MBA from the Columbia Business School.

2019 TAX NOTICE TO SHAREHOLDERS(Unaudited)

For the year ended December 31, 2019, the Fund paid to shareholders ordinary income distributions (comprised of net investment income and short term capital gains) totaling $0.3479, $0.3454, $0.3101, and $0.3665 per share for Class AAA, Class A, Class C and Class I Shares, respectively. For the year ended December 31, 2019, 10.97% of the ordinary income distribution qualifies for the dividends received deduction available to corporations. The Fund designates 31.57% of the ordinary income distribution as qualified dividend income pursuant to the Jobs and Growth Tax Relief Reconciliation Act of 2003. The Fund designates 7.35% of the ordinary income distribution as qualified interest income pursuant to the Tax Relief, Unemployment Reauthorization, and Job Creation Act of 2010.

U.S. Government Income

The percentage of the ordinary income distribution paid by the Fund during 2019 which was derived from U.S. Treasury securities was 0.50%. Such income is exempt from state and local tax in all states. However, many states, including New York and California, allow a tax exemption for a portion of the income earned only if a mutual fund has invested at least 50% of its assets at the end of each quarter of the Fund’s fiscal year in U.S. Government securities. The Fund did not meet this strict requirement in 2019. The percentage of U.S. Government securities held as of December 31, 2019 was 0.00%. Due to the diversity in state and local tax law, it is recommended that you consult your personal tax adviser as to the applicability of the information provided to your specific situation.

All designations are based on financial information available as of the date of this annual report and, accordingly, are subject to change. For each item, it is the intention of the Fund to designate the maximum amount permitted under the Internal Revenue Code and the regulations thereunder.

We have separated the portfolio managers’ commentary from the financial statements and investment portfolio due to corporate governance regulations stipulated by the Sarbanes-Oxley Act of 2002. We have done this to ensure that the content of the portfolio managers’ commentary is unrestricted. Both the commentary and the financial statements, including the portfolio of investments, will be available on our website at www.gabelli.com.

GAMCO Global Series Funds, Inc.

THE GABELLI GLOBAL MINI MITES FUND

One Corporate Center

Rye, New York 10580-1422

t800-GABELLI(800-422-3554)

f914-921-5118

e info@gabelli.com

   GABELLI.COM

Net Asset Value per share available daily

by calling800-GABELLI after 7:00 P.M.

BOARD OF DIRECTORS

OFFICERS

Mario J. Gabelli, CFA Chairman and Chief Executive Officer, GAMCO Investors, Inc. Executive Chairman, Associated Capital Group, Inc. E. Val Cerutti Chief Executive Officer, Cerutti Consultants, Inc. Anthony J. Colavita President, Anthony J. Colavita, P.C. John D. Gabelli Senior Vice President, G.research, LLC Werner J. Roeder Former Medical Director, Lawrence Hospital Anthonie C. van Ekris Chairman, BALMAC International, Inc. Salvatore J. Zizza Chairman, Zizza & Associates Corp.

Bruce N. Alpert President John C. Ball Treasurer Agnes Mullady Vice President Andrea R. Mango Secretary Richard J. Walz Chief Compliance Officer DISTRIBUTOR G.distributors, LLC CUSTODIAN State Street Bank and Trust Company TRANSFER AGENT AND DIVIDEND DISBURSING AGENT DST Asset Manager Solutions, Inc. LEGAL COUNSEL Skadden, Arps, Slate, Meagher & Flom LLP

This report is submitted for the general information of the shareholders of The Gabelli Global Mini Mites Fund. It is not authorized for distribution to prospective investors unless preceded or accompanied by an effective prospectus.

GAB3634Q419AR

Item 2. Code of Ethics.

(a) The registrant, as of the end of the period covered by this report, has adopted a code of ethics that applies to the registrant’s principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party.

(c) There have been no amendments, during the period covered by this report, to a provision of the code of ethics that applies to the registrant’s principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics description.

(d) The registrant has not granted any waivers, including an implicit waiver, from a provision of the code of ethics that applies to the registrant’s principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this item’s instructions.

Item 3. Audit Committee Financial Expert.

As of the end of the period covered by the report, the registrant’s Board of Directors has determined that Salvatore J. Zizza is qualified to serve as an audit committee financial expert serving on its audit committee and that he is “independent,” as defined by Item 3 of FormN-CSR.

Item 4. Principal Accountant Fees and Services.

Audit Fees

(a) The aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant’s annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years are $130,900 for 2018 and $130,900 for 2019.

Audit-Related Fees

(b) The aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant’s financial statements and are not reported under paragraph (a) of this Item are $3,500 for 2018 and $0 for 2019.

Tax Fees

(c) The aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning are $19,000 for 2018

and $19,000 for 2019. Tax fees represent tax compliance services provided in connection with the review of the Registrant’s tax returns.

All Other Fees

(d) The aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item are $4,803 for 2018 and $6,238 for 2019. The fees relate to Passive Foreign Investment Company identification database subscription fees billed on an annual basis.

(e)(1) Disclose the audit committee’spre-approval policies and procedures described in paragraph (c)(7) of Rule2-01 of RegulationS-X.

Pre-Approval Policies and Procedures. The Audit Committee (“Committee”) of the registrant is responsible forpre-approving (i) all audit and permissiblenon-audit services to be provided by the independent registered public accounting firm to the registrant and (ii) all permissiblenon-audit services to be provided by the independent registered public accounting firm to the Adviser, Gabelli Funds, LLC, and any affiliate of Gabelli Funds, LLC (“Gabelli”) that provides services to the registrant (a “Covered Services Provider”) if the independent registered public accounting firm’s engagement related directly to the operations and financial reporting of the registrant. The Committee may delegate its responsibility topre-approve any such audit and permissiblenon-audit services to the Chairperson of the Committee, and the Chairperson must report to the Committee, at its next regularly scheduled meeting after the Chairperson’spre-approval of such services, his or her decision(s). The Committee may also establish detailedpre-approval policies and procedures forpre-approval of such services in accordance with applicable laws, including the delegation of some or all of the Committee’spre-approval responsibilities to the other persons (other than Gabelli or the registrant’s officers).Pre-approval by the Committee of any permissiblenon-audit services is not required so long as: (i) the permissiblenon-audit services were not recognized by the registrant at the time of the engagement to benon-audit services; and (ii) such services are promptly brought to the attention of the Committee and approved by the Committee or Chairperson prior to the completion of the audit.

(e)(2) The percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule2-01 of RegulationS-X are as follows:

(b) N/A

(c) 0%

(d) 0%

(f) The percentage of hours expended on the principal accountant’s engagement to audit the registrant’s financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant’s full-time, permanent employees was less than fifty percent.

(g) The aggregatenon-audit fees billed by the registrant’s accountant for services rendered to the registrant, and rendered to the registrant’s investment adviser (not including anysub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another

investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant was $62,121 for 2018 and $68,798 for 2019.

(h) The registrant’s audit committee of the board of directors has considered whether the provision ofnon-audit services that were rendered to the registrant’s investment adviser (not including anysub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were notpre-approved pursuant to paragraph (c)(7)(ii) of Rule2-01 of RegulationS-X is compatible with maintaining the principal accountant’s independence.

Item 5. Audit Committee of Listed Registrants.

Not applicable.

Item 6. Investments.

(a) Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period is included as part of the report to shareholders filed under Item 1 of this form.

(b) Not applicable due to no such divestments during the semi-annual period covered since the previous FormN-CSR filing.

Item 7. Disclosure of Proxy Voting Policies and Procedures forClosed-End Management Investment Companies.

Not applicable.

Item 8. Portfolio Managers ofClosed-End Management Investment Companies.

Not applicable.

Item 9. Purchases of Equity Securities byClosed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders.

There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant’s Board of Directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of RegulationS-K (17 CFR 229.407) (as required by Item 22(b)(15) of Schedule 14A (17 CFR240.14a-101)), or this Item.

Item 11. Controls and Procedures.

(a) The registrant’s principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant’s disclosure controls and procedures (as defined in Rule30a-3(c) under the Investment Company Act of 1940, as amended (the “1940

Act”) (17 CFR270.30a-3(c))) are effective, as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on their evaluation of these controls and procedures required by Rule30a-3(b) under the 1940 Act (17 CFR270.30a-3(b)) and Rules13a-15(b) or15d-15(b) under the Securities Exchange Act of 1934, as amended (17 CFR240.13a-15(b) or240.15d-15(b)).

(b) There were no changes in the registrant’s internal control over financial reporting (as defined in Rule30a-3(d) under the 1940 Act (17 CFR270.30a-3(d))) that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12. Disclosure of Securities Lending Activities forClosed-End Management Investment Companies.

Not applicable.

Item 13. Exhibits.

(a)(1) Code of ethics, or any amendment thereto, that is the subject of disclosure required by Item 2 is attached hereto.

(a)(2) Certifications pursuant to Rule30a-2(a) under the 1940 Act and Section 302 of the Sarbanes-Oxley Act of 2002 are attached hereto.

(a)(3) Not applicable.

(a)(4) Not applicable.

(b) Certifications pursuant to Rule30a-2(b) under the 1940 Act and Section 906 of the Sarbanes- Oxley Act of 2002 are attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)                                GAMCO Global Series Funds, Inc.

By (Signature and Title)*	/s/ Bruce N. Alpert
	Bruce N. Alpert, Principal Executive Officer

Date     March 6, 2020

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*	/s/ Bruce N. Alpert
	Bruce N. Alpert, Principal Executive Officer

Date     March 6, 2020

By (Signature and Title)*	/s/ John C. Ball
	John C. Ball, Principal Financial Officer and Treasurer

Date     March 6, 2020

^* Print the name and title of each signing officer under his or her signature.