v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name GAMCO GLOBAL SERIES FUNDS, INC
Entity Central Index Key 0000909504
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000002867  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Growth Fund
Class Name Class AAA
Trading Symbol GICPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Growth Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GICPX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GICPX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Growth Fund - Class AAA
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Growth Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification. Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding AI usage, and a de-escalatory path for conflicts in the Middle East.  Value stocks widely outperformed for a second consecutive quarter. Contributors included GE Vernova, ASML Holding NV, and Applied Materials. Detractors included Microsoft Corp., Boston Scientific, and Netflix. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Growth Fund - Class AAA
MSCI ACWI Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
06/17
11,831
11,942
11,927
06/18
14,281
13,293
13,584
06/19
15,741
14,133
14,941
06/20
18,368
14,506
16,602
06/21
25,001
20,289
22,843
06/22
17,669
17,171
17,107
06/23
21,912
20,112
20,446
06/24
28,930
24,119
24,660
06/25
32,844
28,144
28,105
06/26
35,857
34,944
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Growth Fund - Class AAA
4.29%
9.17%
7.48%
13.62%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 194,119,256
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ 477,252
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$194,119,256
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate6%
  • Management Fees$477,252
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
96.2%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.1)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Information Technology - Semiconductors, Hardware, and Equipment
26.3%
Industrials
18.8%
Financials
13.5%
Communication Services
11.2%
Health Care
8.5%
Consumer Discretionary
8.2%
Information Technology - Software and Services
7.1%
U.S. Government Obligations
3.9%
Other Industry sectors
2.6%
Other Assets and Liabilities (Net)
(0.1)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
NVIDIA Corp.
7.6%
Alphabet Inc.
5.3%
Eli Lilly & Co.
5.1%
Amazon.com Inc.
4.6%
GE Vernova Inc.
4.4%
Microsoft Corp.
3.8%
Broadcom Inc.
3.8%
ASML Holding NV
3.6%
Apple Inc.
3.6%
Investor AB
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GICPX/
C000002869  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Growth Fund
Class Name Class C
Trading Symbol GGGCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Growth Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GGGCX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GGGCX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Growth Fund - Class C
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Growth Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification. Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding AI usage, and a de-escalatory path for conflicts in the Middle East.  Value stocks widely outperformed for a second consecutive quarter. Contributors included GE Vernova, ASML Holding NV, and Applied Materials. Detractors included Microsoft Corp., Boston Scientific, and Netflix. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Growth Fund - Class C
The Gabelli Global Growth Fund - Class C (includes sales charge)
MSCI ACWI Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
10,000
06/17
11,742
11,742
11,942
11,927
06/18
14,068
14,068
13,293
13,584
06/19
15,389
15,389
14,133
14,941
06/20
17,902
17,902
14,506
16,602
06/21
24,366
24,366
20,289
22,843
06/22
17,222
17,222
17,171
17,107
06/23
21,357
21,357
20,112
20,446
06/24
28,198
28,198
24,119
24,660
06/25
32,011
32,011
28,144
28,105
06/26
34,954
34,954
34,944
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Growth Fund - Class C
4.31%
9.20%
7.48%
13.33%
The Gabelli Global Growth Fund - Class C (includes sales charge)
3.31%
8.20%
7.48%
13.33%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 194,119,256
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ 477,252
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$194,119,256
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate6%
  • Management Fees$477,252
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
96.2%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.1)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Information Technology - Semiconductors, Hardware, and Equipment
26.3%
Industrials
18.8%
Financials
13.5%
Communication Services
11.2%
Health Care
8.5%
Consumer Discretionary
8.2%
Information Technology - Software and Services
7.1%
U.S. Government Obligations
3.9%
Other Industry sectors
2.6%
Other Assets and Liabilities (Net)
(0.1)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
NVIDIA Corp.
7.6%
Alphabet Inc.
5.3%
Eli Lilly & Co.
5.1%
Amazon.com Inc.
4.6%
GE Vernova Inc.
4.4%
Microsoft Corp.
3.8%
Broadcom Inc.
3.8%
ASML Holding NV
3.6%
Apple Inc.
3.6%
Investor AB
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GGGCX/
C000034309  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Growth Fund
Class Name Class I
Trading Symbol GGGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Growth Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GGGIX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GGGIX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Growth Fund - Class I
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Growth Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification. Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding AI usage, and a de-escalatory path for conflicts in the Middle East.  Value stocks widely outperformed for a second consecutive quarter. Contributors included GE Vernova, ASML Holding NV, and Applied Materials. Detractors included Microsoft Corp., Boston Scientific, and Netflix. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Growth Fund - Class I
MSCI ACWI Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
06/17
11,914
11,942
11,927
06/18
14,467
13,293
13,584
06/19
15,990
14,133
14,941
06/20
18,675
14,506
16,602
06/21
25,416
20,289
22,843
06/22
17,963
17,171
17,107
06/23
22,282
20,112
20,446
06/24
29,424
24,119
24,660
06/25
33,400
28,144
28,105
06/26
36,476
34,944
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Growth Fund - Class I
4.31%
9.21%
7.49%
13.82%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 194,119,256
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ 477,252
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$194,119,256
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate6%
  • Management Fees$477,252
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
96.2%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.1)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Information Technology - Semiconductors, Hardware, and Equipment
26.3%
Industrials
18.8%
Financials
13.5%
Communication Services
11.2%
Health Care
8.5%
Consumer Discretionary
8.2%
Information Technology - Software and Services
7.1%
U.S. Government Obligations
3.9%
Other Industry sectors
2.6%
Other Assets and Liabilities (Net)
(0.1)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
NVIDIA Corp.
7.6%
Alphabet Inc.
5.3%
Eli Lilly & Co.
5.1%
Amazon.com Inc.
4.6%
GE Vernova Inc.
4.4%
Microsoft Corp.
3.8%
Broadcom Inc.
3.8%
ASML Holding NV
3.6%
Apple Inc.
3.6%
Investor AB
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GGGIX/
C000002866  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Growth Fund
Class Name Class A
Trading Symbol GGGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Growth Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GGGAX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GGGAX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Growth Fund - Class A
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Growth Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification. Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding AI usage, and a de-escalatory path for conflicts in the Middle East.  Value stocks widely outperformed for a second consecutive quarter. Contributors included GE Vernova, ASML Holding NV, and Applied Materials. Detractors included Microsoft Corp., Boston Scientific, and Netflix. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Growth Fund - Class A
The Gabelli Global Growth Fund - Class A (includes sales charge)
MSCI ACWI Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
10,000
06/17
11,829
11,149
11,942
11,927
06/18
14,279
13,458
13,293
13,584
06/19
15,735
14,830
14,133
14,941
06/20
18,363
17,307
14,506
16,602
06/21
24,992
23,555
20,289
22,843
06/22
17,658
16,643
17,171
17,107
06/23
21,902
20,643
20,112
20,446
06/24
28,917
27,255
24,119
24,660
06/25
32,827
30,940
28,144
28,105
06/26
35,848
33,787
34,944
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Growth Fund - Class A
4.31%
9.20%
7.48%
13.62%
The Gabelli Global Growth Fund - Class A (includes sales charge)
(1.69)%
2.92%
6.22%
12.95%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 194,119,256
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ 477,252
InvestmentCompanyPortfolioTurnover 6.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$194,119,256
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate6%
  • Management Fees$477,252
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
96.2%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.1)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Information Technology - Semiconductors, Hardware, and Equipment
26.3%
Industrials
18.8%
Financials
13.5%
Communication Services
11.2%
Health Care
8.5%
Consumer Discretionary
8.2%
Information Technology - Software and Services
7.1%
U.S. Government Obligations
3.9%
Other Industry sectors
2.6%
Other Assets and Liabilities (Net)
(0.1)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
NVIDIA Corp.
7.6%
Alphabet Inc.
5.3%
Eli Lilly & Co.
5.1%
Amazon.com Inc.
4.6%
GE Vernova Inc.
4.4%
Microsoft Corp.
3.8%
Broadcom Inc.
3.8%
ASML Holding NV
3.6%
Apple Inc.
3.6%
Investor AB
3.6%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GGGAX/
C000002875  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Content & Connectivity Fund
Class Name Class AAA
Trading Symbol GABTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Content & Connectivity Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GABTX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GABTX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Content & Connectivity Fund - Class AAA
$48
0.92%
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Content and Connectivity Fund Class AAA, A, and I underperformed its broad-based benchmark, the MSCI AC World Index and all shares outperformed the comparative benchmark, MSCI AC World Communication Index. Global equities rallied in the second quarter as investors rotated back into artificial intelligence - related names, with overall market momentum further helped by de-escalation of conflict in the Middle East and decline in Brent crude prices. Contributors included Anterix Inc., Millicom International Cellular, and SoftBank Group. Detractors included Prosus NV, Kinnevik AB, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Content & Connectivity Fund - Class AAA
MSCI ACWI Index
MSCI AC World Communication Services Index
06/16
10,000
10,000
10,000
06/17
10,592
11,942
9,851
06/18
10,527
13,293
9,517
06/19
10,834
14,133
10,819
06/20
10,503
14,506
11,826
06/21
14,666
20,289
16,841
06/22
10,555
17,171
11,857
06/23
11,181
20,112
13,144
06/24
13,741
24,119
17,426
06/25
16,799
28,144
21,929
06/26
21,085
34,944
24,793
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Content & Connectivity Fund - Class AAA
11.42%
25.51%
7.53%
7.75%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
MSCI AC World Communication Services Index
(2.23)%
13.06%
8.04%
9.51%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 81,726,516
Holdings Count | Holding 62
Advisory Fees Paid, Amount $ 120,487
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$81,726,516
  • Number of Portfolio Holdings62
  • Portfolio Turnover Rate11%
  • Management Fees$120,487
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
99.7%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Communication Services
75.6%
Consumer Discretionary
9.8%
Information Technology
5.1%
Financials
5.1%
Real Estate
2.8%
Energy
1.3%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
SoftBank Group Corp.
9.6%
Anterix Inc.
8.8%
Alphabet Inc.
8.4%
Millicom International Cellular SA
5.3%
Meta Platforms Inc.
4.8%
T-Mobile US Inc.
4.5%
Prosus NV
3.8%
Telephone and Data Systems Inc.
3.4%
Deutsche Telekom AG
3.3%
Rogers Communications Inc.
3.2%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GABTX/
C000002877  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Content & Connectivity Fund
Class Name Class C
Trading Symbol GTCCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Content & Connectivity Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GTCCX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GTCCX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Content & Connectivity Fund - Class C
$52
0.92%
Expenses Paid, Amount $ 52
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Content and Connectivity Fund Class AAA, A, and I underperformed its broad-based benchmark, the MSCI AC World Index and all shares outperformed the comparative benchmark, MSCI AC World Communication Index. Global equities rallied in the second quarter as investors rotated back into artificial intelligence - related names, with overall market momentum further helped by de-escalation of conflict in the Middle East and decline in Brent crude prices. Contributors included Anterix Inc., Millicom International Cellular, and SoftBank Group. Detractors included Prosus NV, Kinnevik AB, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Content & Connectivity Fund - Class C
The Gabelli Global Content & Connectivity Fund - Class C (includes sales charge)
MSCI ACWI Index
MSCI AC World Communication Services Index
06/16
10,000
10,000
10,000
10,000
06/17
10,510
10,510
11,942
9,851
06/18
10,368
10,368
13,293
9,517
06/19
10,590
10,590
14,133
10,819
06/20
10,234
10,234
14,506
11,826
06/21
14,288
14,288
20,289
16,841
06/22
10,286
10,286
17,171
11,857
06/23
10,838
10,838
20,112
13,144
06/24
13,327
13,327
24,119
17,426
06/25
17,366
17,366
28,144
21,929
06/26
25,013
25,013
34,944
24,793
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Content & Connectivity Fund - Class C
27.83%
44.03%
11.85%
9.60%
The Gabelli Global Content & Connectivity Fund - Class C (includes sales charge)
26.83%
43.03%
11.85%
9.60%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
MSCI AC World Communication Services Index
(2.23)%
13.06%
8.04%
9.51%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 81,726,516
Holdings Count | Holding 62
Advisory Fees Paid, Amount $ 120,487
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$81,726,516
  • Number of Portfolio Holdings62
  • Portfolio Turnover Rate11%
  • Management Fees$120,487
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
99.7%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Communication Services
75.6%
Consumer Discretionary
9.8%
Information Technology
5.1%
Financials
5.1%
Real Estate
2.8%
Energy
1.3%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
SoftBank Group Corp.
9.6%
Anterix Inc.
8.8%
Alphabet Inc.
8.4%
Millicom International Cellular SA
5.3%
Meta Platforms Inc.
4.8%
T-Mobile US Inc.
4.5%
Prosus NV
3.8%
Telephone and Data Systems Inc.
3.4%
Deutsche Telekom AG
3.3%
Rogers Communications Inc.
3.2%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GTCCX/
C000034311  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Content & Connectivity Fund
Class Name Class I
Trading Symbol GTTIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Content & Connectivity Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GTTIX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GTTIX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Content & Connectivity Fund - Class I
$48
0.92%
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Content and Connectivity Fund Class AAA, A, and I underperformed its broad-based benchmark, the MSCI AC World Index and all shares outperformed the comparative benchmark, MSCI AC World Communication Index. Global equities rallied in the second quarter as investors rotated back into artificial intelligence - related names, with overall market momentum further helped by de-escalation of conflict in the Middle East and decline in Brent crude prices. Contributors included Anterix Inc., Millicom International Cellular, and SoftBank Group. Detractors included Prosus NV, Kinnevik AB, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Content & Connectivity Fund - Class I
MSCI ACWI Index
MSCI AC World Communication Services Index
06/16
10,000
10,000
10,000
06/17
10,638
11,942
9,851
06/18
10,655
13,293
9,517
06/19
11,047
14,133
10,819
06/20
10,746
14,506
11,826
06/21
14,999
20,289
16,841
06/22
10,793
17,171
11,857
06/23
11,436
20,112
13,144
06/24
14,057
24,119
17,426
06/25
17,187
28,144
21,929
06/26
21,570
34,944
24,793
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Content & Connectivity Fund - Class I
11.47%
25.50%
7.54%
7.99%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
MSCI AC World Communication Services Index
(2.23)%
13.06%
8.04%
9.51%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 81,726,516
Holdings Count | Holding 62
Advisory Fees Paid, Amount $ 120,487
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$81,726,516
  • Number of Portfolio Holdings62
  • Portfolio Turnover Rate11%
  • Management Fees$120,487
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
99.7%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Communication Services
75.6%
Consumer Discretionary
9.8%
Information Technology
5.1%
Financials
5.1%
Real Estate
2.8%
Energy
1.3%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
SoftBank Group Corp.
9.6%
Anterix Inc.
8.8%
Alphabet Inc.
8.4%
Millicom International Cellular SA
5.3%
Meta Platforms Inc.
4.8%
T-Mobile US Inc.
4.5%
Prosus NV
3.8%
Telephone and Data Systems Inc.
3.4%
Deutsche Telekom AG
3.3%
Rogers Communications Inc.
3.2%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GTTIX/
C000002874  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Content & Connectivity Fund
Class Name Class A
Trading Symbol GTCAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Content & Connectivity Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GTCAX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GTCAX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Content & Connectivity Fund - Class A
$48
0.92%
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Content and Connectivity Fund Class AAA, A, and I underperformed its broad-based benchmark, the MSCI AC World Index and all shares outperformed the comparative benchmark, MSCI AC World Communication Index. Global equities rallied in the second quarter as investors rotated back into artificial intelligence - related names, with overall market momentum further helped by de-escalation of conflict in the Middle East and decline in Brent crude prices. Contributors included Anterix Inc., Millicom International Cellular, and SoftBank Group. Detractors included Prosus NV, Kinnevik AB, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Content & Connectivity Fund - Class A
The Gabelli Global Content & Connectivity Fund - Class A (includes sales charge)
MSCI ACWI Index
MSCI AC World Communication Services Index
06/16
10,000
10,000
10,000
10,000
06/17
10,576
9,968
11,942
9,851
06/18
10,512
9,908
13,293
9,517
06/19
10,820
10,198
14,133
10,819
06/20
10,486
9,883
14,506
11,826
06/21
14,640
13,798
20,289
16,841
06/22
10,537
9,931
17,171
11,857
06/23
11,163
10,521
20,112
13,144
06/24
13,719
12,930
24,119
17,426
06/25
16,774
15,810
28,144
21,929
06/26
21,051
19,841
34,944
24,793
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Content & Connectivity Fund - Class A
11.41%
25.49%
7.53%
7.73%
The Gabelli Global Content & Connectivity Fund - Class A (includes sales charge)
5.01%
18.28%
6.27%
7.09%
MSCI ACWI Index
11.49%
24.16%
11.49%
13.33%
MSCI AC World Communication Services Index
(2.23)%
13.06%
8.04%
9.51%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 81,726,516
Holdings Count | Holding 62
Advisory Fees Paid, Amount $ 120,487
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$81,726,516
  • Number of Portfolio Holdings62
  • Portfolio Turnover Rate11%
  • Management Fees$120,487
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
99.7%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Communication Services
75.6%
Consumer Discretionary
9.8%
Information Technology
5.1%
Financials
5.1%
Real Estate
2.8%
Energy
1.3%
U.S. Government Obligations
0.3%
Other Assets and Liabilities (Net)Footnote Reference*
0.0%
FootnoteDescription
Footnote*
Amount represents less than 0.05%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
SoftBank Group Corp.
9.6%
Anterix Inc.
8.8%
Alphabet Inc.
8.4%
Millicom International Cellular SA
5.3%
Meta Platforms Inc.
4.8%
T-Mobile US Inc.
4.5%
Prosus NV
3.8%
Telephone and Data Systems Inc.
3.4%
Deutsche Telekom AG
3.3%
Rogers Communications Inc.
3.2%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GTCAX/
C000204772  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Mini Mites Fund
Class Name Class A
Trading Symbol GMNAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Mini Mites Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GMNAX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GMNAX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Mini Mites Fund - Class A
$49
0.90%
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, The Gabelli Global Mini Mites Fund underperformed its broad-based benchmark, the Russell 2000 Index, and outperformed its comparatives, the MSCI World Micro Cap and S&P SmallCap 600 Indices. For the period, global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. Contributors to performance included Entravision Communications Corp., Park-Ohio Holdings Corp., Ampco-Pittsburg. Detractors included Genius Sports Limited, Velan Inc., and EW Scripps Company. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Mini Mites Fund - Class A
The Gabelli Global Mini Mites Fund - Class A (includes sales charge)
Russell 2000 Index
MSCI World Micro Cap Index
S&P Developed Small Cap Index
10/18
10,000
10,000
10,000
10,000
10,000
06/19
9,279
8,745
9,669
9,044
9,824
06/20
7,686
7,244
9,028
8,790
9,283
06/21
14,538
13,702
14,628
14,527
14,169
06/22
10,883
10,257
10,942
10,864
11,019
06/23
13,102
12,348
12,289
11,157
12,531
06/24
14,556
13,718
13,525
11,724
13,737
06/25
17,133
16,147
14,564
14,116
15,625
06/26
23,138
21,806
20,503
17,854
20,288
Average Annual Return [Table Text Block]
Table Summary
Fund
6 months
1 Year
5 Year
Since Inception (10/1/2018)
The Gabelli Global Mini Mites Fund - Class A
21.78%
35.05%
9.74%
11.44%
The Gabelli Global Mini Mites Fund - Class A (includes sales charge)
14.77%
27.28%
8.45%
10.59%
Russell 2000 Index
22.57%
40.78%
6.98%
9.41%
MSCI World Micro Cap Index
9.34%
26.48%
4.22%
7.88%
S&P Developed Small Cap Index
17.08%
29.84%
7.44%
9.31%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 26,972,278
Holdings Count | Holding 173
Advisory Fees Paid, Amount $ 21,986
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$26,972,278
  • Number of Portfolio Holdings173
  • Portfolio Turnover Rate11%
  • Management Fees$21,986
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
75.6%
U.S. Government Obligations
27.6%
Other Assets and Liabilities (Net)
(3.2)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
U.S. Government Obligations
27.6%
Diversified Industrial
11.6%
Metals and Mining
9.5%
Automotive: Parts and Accessories
5.4%
Broadcasting
4.9%
Hotels and Gaming
4.4%
Consumer Products
4.1%
Aerospace and Defense
4.0%
Other Industry sectors
31.7%
Other Assets and Liabilities (Net)
(3.2)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Park-Ohio Holdings Corp.
5.0%
Ampco-Pittsburgh Corp.
4.1%
Tredegar Corp.
4.0%
Entravision Communications Corp.
3.4%
Myers Industries Inc.
2.7%
Anterix Inc.
1.9%
Twin Disc Inc.
1.9%
Monro Inc.
1.8%
L.B. Foster Co.
1.7%
Garrett Motion Inc.
1.7%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GMNAX/
C000204774  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Mini Mites Fund
Class Name Class C
Trading Symbol GMNCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Mini Mites Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GMNCX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GMNCX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Mini Mites Fund - Class C
$50
0.90%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, The Gabelli Global Mini Mites Fund underperformed its broad-based benchmark, the Russell 2000 Index, and outperformed its comparatives, the MSCI World Micro Cap and S&P SmallCap 600 Indices. For the period, global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. Contributors to performance included Entravision Communications Corp., Park-Ohio Holdings Corp., Ampco-Pittsburg. Detractors included Genius Sports Limited, Velan Inc., and EW Scripps Company. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Mini Mites Fund - Class C
The Gabelli Global Mini Mites Fund - Class C (includes sales charge)
Russell 2000 Index
MSCI World Micro Cap Index
S&P Developed Small Cap Index
10/18
10,000
10,000
10,000
10,000
10,000
06/19
9,243
9,243
9,669
9,044
9,824
06/20
7,633
7,633
9,028
8,790
9,283
06/21
14,435
14,435
14,628
14,527
14,169
06/22
10,807
10,807
10,942
10,864
11,019
06/23
13,003
13,003
12,289
11,157
12,531
06/24
14,446
14,446
13,525
11,724
13,737
06/25
17,009
17,009
14,564
14,116
15,625
06/26
22,972
22,972
20,503
17,854
20,288
Average Annual Return [Table Text Block]
Table Summary
Fund
6 months
1 Year
5 Year
Since Inception (10/1/2018)
The Gabelli Global Mini Mites Fund - Class C
21.87%
35.06%
9.74%
11.34%
The Gabelli Global Mini Mites Fund - Class C (includes sales charge)
20.87%
34.06%
9.74%
11.34%
Russell 2000 Index
22.57%
40.78%
6.98%
9.41%
MSCI World Micro Cap Index
9.34%
26.48%
4.22%
7.88%
S&P Developed Small Cap Index
17.08%
29.84%
7.44%
9.31%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 26,972,278
Holdings Count | Holding 173
Advisory Fees Paid, Amount $ 21,986
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$26,972,278
  • Number of Portfolio Holdings173
  • Portfolio Turnover Rate11%
  • Management Fees$21,986
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
75.6%
U.S. Government Obligations
27.6%
Other Assets and Liabilities (Net)
(3.2)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
U.S. Government Obligations
27.6%
Diversified Industrial
11.6%
Metals and Mining
9.5%
Automotive: Parts and Accessories
5.4%
Broadcasting
4.9%
Hotels and Gaming
4.4%
Consumer Products
4.1%
Aerospace and Defense
4.0%
Other Industry sectors
31.7%
Other Assets and Liabilities (Net)
(3.2)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Park-Ohio Holdings Corp.
5.0%
Ampco-Pittsburgh Corp.
4.1%
Tredegar Corp.
4.0%
Entravision Communications Corp.
3.4%
Myers Industries Inc.
2.7%
Anterix Inc.
1.9%
Twin Disc Inc.
1.9%
Monro Inc.
1.8%
L.B. Foster Co.
1.7%
Garrett Motion Inc.
1.7%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GMNCX/
C000204771  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Mini Mites Fund
Class Name Class I
Trading Symbol GGMMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Mini Mites Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GGMMX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GGMMX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Mini Mites Fund - Class I
$50
0.90%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, The Gabelli Global Mini Mites Fund underperformed its broad-based benchmark, the Russell 2000 Index, and outperformed its comparatives, the MSCI World Micro Cap and S&P SmallCap 600 Indices. For the period, global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. Contributors to performance included Entravision Communications Corp., Park-Ohio Holdings Corp., Ampco-Pittsburg. Detractors included Genius Sports Limited, Velan Inc., and EW Scripps Company. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Mini Mites Fund - Class I
Russell 2000 Index
MSCI World Micro Cap Index
S&P Developed Small Cap Index
10/18
10,000
10,000
10,000
10,000
06/19
9,296
9,669
9,044
9,824
06/20
7,719
9,028
8,790
9,283
06/21
14,591
14,628
14,527
14,169
06/22
10,914
10,942
10,864
11,019
06/23
13,151
12,289
11,157
12,531
06/24
14,596
13,525
11,724
13,737
06/25
17,180
14,564
14,116
15,625
06/26
23,218
20,503
17,854
20,288
Average Annual Return [Table Text Block]
Table Summary
Fund
6 months
1 Year
5 Year
Since Inception (10/1/2018)
The Gabelli Global Mini Mites Fund - Class I
21.86%
35.14%
9.73%
11.49%
Russell 2000 Index
22.57%
40.78%
6.98%
9.41%
MSCI World Micro Cap Index
9.34%
26.48%
4.22%
7.88%
S&P Developed Small Cap Index
17.08%
29.84%
7.44%
9.31%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 26,972,278
Holdings Count | Holding 173
Advisory Fees Paid, Amount $ 21,986
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$26,972,278
  • Number of Portfolio Holdings173
  • Portfolio Turnover Rate11%
  • Management Fees$21,986
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
75.6%
U.S. Government Obligations
27.6%
Other Assets and Liabilities (Net)
(3.2)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
U.S. Government Obligations
27.6%
Diversified Industrial
11.6%
Metals and Mining
9.5%
Automotive: Parts and Accessories
5.4%
Broadcasting
4.9%
Hotels and Gaming
4.4%
Consumer Products
4.1%
Aerospace and Defense
4.0%
Other Industry sectors
31.7%
Other Assets and Liabilities (Net)
(3.2)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Park-Ohio Holdings Corp.
5.0%
Ampco-Pittsburgh Corp.
4.1%
Tredegar Corp.
4.0%
Entravision Communications Corp.
3.4%
Myers Industries Inc.
2.7%
Anterix Inc.
1.9%
Twin Disc Inc.
1.9%
Monro Inc.
1.8%
L.B. Foster Co.
1.7%
Garrett Motion Inc.
1.7%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GGMMX/
C000204773  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Mini Mites Fund
Class Name Class AAA
Trading Symbol GAMNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Mini Mites Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GAMNX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GAMNX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Mini Mites Fund - Class AAA
$50
0.90%
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, The Gabelli Global Mini Mites Fund underperformed its broad-based benchmark, the Russell 2000 Index, and outperformed its comparatives, the MSCI World Micro Cap and S&P SmallCap 600 Indices. For the period, global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. Contributors to performance included Entravision Communications Corp., Park-Ohio Holdings Corp., Ampco-Pittsburg. Detractors included Genius Sports Limited, Velan Inc., and EW Scripps Company. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Mini Mites Fund - Class AAA
Russell 2000 Index
MSCI World Micro Cap Index
S&P Developed Small Cap Index
10/18
10,000
10,000
10,000
10,000
06/19
9,290
9,669
9,044
9,824
06/20
7,699
9,028
8,790
9,283
06/21
14,553
14,628
14,527
14,169
06/22
10,885
10,942
10,864
11,019
06/23
13,117
12,289
11,157
12,531
06/24
14,558
13,525
11,724
13,737
06/25
17,136
14,564
14,116
15,625
06/26
23,157
20,503
17,854
20,288
Average Annual Return [Table Text Block]
Table Summary
Fund
6 months
1 Year
5 Year
Since Inception (10/1/2018)
The Gabelli Global Mini Mites Fund - Class AAA
21.86%
35.14%
9.73%
11.45%
Russell 2000 Index
22.57%
40.78%
6.98%
9.41%
MSCI World Micro Cap Index
9.34%
26.48%
4.22%
7.88%
S&P Developed Small Cap Index
17.08%
29.84%
7.44%
9.31%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 26,972,278
Holdings Count | Holding 173
Advisory Fees Paid, Amount $ 21,986
InvestmentCompanyPortfolioTurnover 11.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$26,972,278
  • Number of Portfolio Holdings173
  • Portfolio Turnover Rate11%
  • Management Fees$21,986
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
75.6%
U.S. Government Obligations
27.6%
Other Assets and Liabilities (Net)
(3.2)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
U.S. Government Obligations
27.6%
Diversified Industrial
11.6%
Metals and Mining
9.5%
Automotive: Parts and Accessories
5.4%
Broadcasting
4.9%
Hotels and Gaming
4.4%
Consumer Products
4.1%
Aerospace and Defense
4.0%
Other Industry sectors
31.7%
Other Assets and Liabilities (Net)
(3.2)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Park-Ohio Holdings Corp.
5.0%
Ampco-Pittsburgh Corp.
4.1%
Tredegar Corp.
4.0%
Entravision Communications Corp.
3.4%
Myers Industries Inc.
2.7%
Anterix Inc.
1.9%
Twin Disc Inc.
1.9%
Monro Inc.
1.8%
L.B. Foster Co.
1.7%
Garrett Motion Inc.
1.7%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GAMNX/
C000002865  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Rising Income and Dividend Fund
Class Name Class AAA
Trading Symbol GAGCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Rising Income and Dividend Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GAGCX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GAGCX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Rising Income and Dividend Fund - Class AAA
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Rising Income & Dividend Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification.  Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding usage of AI technology, and a de-escalatory path for conflicts in the Middle East. Contributors included Millicom International Cellular, Hewlett Packard, and Enpro Inc. Detractors included Sony Group, Tencent Music Entertainment Group, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Rising Income and Dividend Fund - Class AAA
MSCI World Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
06/17
11,543
11,886
11,927
06/18
11,963
13,277
13,584
06/19
11,733
14,198
14,941
06/20
10,475
14,681
16,602
06/21
15,674
20,505
22,843
06/22
13,184
17,646
17,107
06/23
15,041
21,022
20,446
06/24
15,099
25,384
24,660
06/25
17,689
29,639
28,105
06/26
20,066
36,103
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Rising Income and Dividend Fund - Class AAA
4.94%
13.44%
5.07%
7.21%
MSCI World Index
9.94%
21.81%
11.98%
13.70%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 73,146,316
Holdings Count | Holding 184
Advisory Fees Paid, Amount $ 207,014
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$73,146,316
  • Number of Portfolio Holdings184
  • Portfolio Turnover Rate7%
  • Management Fees$207,014
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
95.4%
U.S. Government Obligations
4.2%
Rights
0.1%
Preferred Stocks
0.1%
Other Assets and Liabilities (Net)
0.2%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Financial Services
14.7%
Food and Beverage
9.7%
Diversified Industrial
8.2%
Energy and Utilities
5.8%
Wireless Telecommunication Services
5.4%
Electronics
5.1%
Entertainment
4.9%
Telecommunication Services
4.6%
Other Industry sectors
41.4%
Other Assets and Liabilities (Net)
0.2%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Sony Group Corp.
5.1%
Berkshire Hathaway Inc.
3.1%
Rolls-Royce Holdings plc
2.6%
Rogers Communications Inc.
2.3%
CNH Industrial NV, New York
2.1%
Mueller Industries Inc.
2.1%
Millicom International Cellular SA
2.1%
The Bank of New York Mellon Corp.
2.0%
Nestlé SA
1.9%
Traton SE
1.8%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GAGCX/
C000002864  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Rising Income and Dividend Fund
Class Name Class C
Trading Symbol GACCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Rising Income and Dividend Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GACCX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GACCX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Rising Income and Dividend Fund - Class C
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Rising Income & Dividend Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification.  Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding usage of AI technology, and a de-escalatory path for conflicts in the Middle East. Contributors included Millicom International Cellular, Hewlett Packard, and Enpro Inc. Detractors included Sony Group, Tencent Music Entertainment Group, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Rising Income and Dividend Fund - Class C
The Gabelli Global Rising Income and Dividend Fund - Class C (includes sales charge)
MSCI World Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
10,000
06/17
11,463
11,463
11,886
11,927
06/18
11,788
11,788
13,277
13,584
06/19
11,478
11,478
14,198
14,941
06/20
10,214
10,214
14,681
16,602
06/21
15,287
15,287
20,505
22,843
06/22
12,857
12,857
17,646
17,107
06/23
14,668
14,668
21,022
20,446
06/24
14,723
14,723
25,384
24,660
06/25
17,248
17,248
29,639
28,105
06/26
19,573
19,573
36,103
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Rising Income and Dividend Fund - Class C
4.95%
13.48%
5.07%
6.95%
The Gabelli Global Rising Income and Dividend Fund - Class C (includes sales charge)
3.95%
12.48%
5.07%
6.95%
MSCI World Index
9.94%
21.81%
11.98%
13.70%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 73,146,316
Holdings Count | Holding 184
Advisory Fees Paid, Amount $ 207,014
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$73,146,316
  • Number of Portfolio Holdings184
  • Portfolio Turnover Rate7%
  • Management Fees$207,014
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
95.4%
U.S. Government Obligations
4.2%
Rights
0.1%
Preferred Stocks
0.1%
Other Assets and Liabilities (Net)
0.2%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Financial Services
14.7%
Food and Beverage
9.7%
Diversified Industrial
8.2%
Energy and Utilities
5.8%
Wireless Telecommunication Services
5.4%
Electronics
5.1%
Entertainment
4.9%
Telecommunication Services
4.6%
Other Industry sectors
41.4%
Other Assets and Liabilities (Net)
0.2%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Sony Group Corp.
5.1%
Berkshire Hathaway Inc.
3.1%
Rolls-Royce Holdings plc
2.6%
Rogers Communications Inc.
2.3%
CNH Industrial NV, New York
2.1%
Mueller Industries Inc.
2.1%
Millicom International Cellular SA
2.1%
The Bank of New York Mellon Corp.
2.0%
Nestlé SA
1.9%
Traton SE
1.8%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GACCX/
C000034308  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Rising Income and Dividend Fund
Class Name Class I
Trading Symbol GAGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Rising Income and Dividend Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GAGIX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GAGIX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Rising Income and Dividend Fund - Class I
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Rising Income & Dividend Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification.  Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding usage of AI technology, and a de-escalatory path for conflicts in the Middle East. Contributors included Millicom International Cellular, Hewlett Packard, and Enpro Inc. Detractors included Sony Group, Tencent Music Entertainment Group, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Rising Income and Dividend Fund - Class I
MSCI World Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
06/17
11,603
11,886
11,927
06/18
12,100
13,277
13,584
06/19
11,956
14,198
14,941
06/20
10,706
14,681
16,602
06/21
16,016
20,505
22,843
06/22
13,472
17,646
17,107
06/23
15,374
21,022
20,446
06/24
15,428
25,384
24,660
06/25
18,075
29,639
28,105
06/26
20,505
36,103
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Rising Income and Dividend Fund - Class I
4.95%
13.44%
5.07%
7.44%
MSCI World Index
9.94%
21.81%
11.98%
13.70%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 73,146,316
Holdings Count | Holding 184
Advisory Fees Paid, Amount $ 207,014
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$73,146,316
  • Number of Portfolio Holdings184
  • Portfolio Turnover Rate7%
  • Management Fees$207,014
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
95.4%
U.S. Government Obligations
4.2%
Rights
0.1%
Preferred Stocks
0.1%
Other Assets and Liabilities (Net)
0.2%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Financial Services
14.7%
Food and Beverage
9.7%
Diversified Industrial
8.2%
Energy and Utilities
5.8%
Wireless Telecommunication Services
5.4%
Electronics
5.1%
Entertainment
4.9%
Telecommunication Services
4.6%
Other Industry sectors
41.4%
Other Assets and Liabilities (Net)
0.2%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Sony Group Corp.
5.1%
Berkshire Hathaway Inc.
3.1%
Rolls-Royce Holdings plc
2.6%
Rogers Communications Inc.
2.3%
CNH Industrial NV, New York
2.1%
Mueller Industries Inc.
2.1%
Millicom International Cellular SA
2.1%
The Bank of New York Mellon Corp.
2.0%
Nestlé SA
1.9%
Traton SE
1.8%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GAGIX/
C000002862  
Shareholder Report [Line Items]  
Fund Name The Gabelli Global Rising Income and Dividend Fund
Class Name Class A
Trading Symbol GAGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Global Rising Income and Dividend Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GAGAX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GAGAX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Global Rising Income and Dividend Fund - Class A
$46
0.90%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.90%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli Global Rising Income & Dividend Fund underperformed its benchmarks, the MSCI AC World Index and Lipper Global Large-Cap Growth Fund Classification.  Following a turbulent start to the year, the second quarter marked a return to stability across markets, the economy, and geopolitics. The rebound was supported by improving economic fundamentals, expanding usage of AI technology, and a de-escalatory path for conflicts in the Middle East. Contributors included Millicom International Cellular, Hewlett Packard, and Enpro Inc. Detractors included Sony Group, Tencent Music Entertainment Group, and T-Mobile US. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli Global Rising Income and Dividend Fund - Class A
The Gabelli Global Rising Income and Dividend Fund - Class A (includes sales charge)
MSCI World Index
Lipper Global Large-Cap Growth Fund Classification
06/16
10,000
10,000
10,000
10,000
06/17
11,547
10,883
11,886
11,927
06/18
11,966
11,277
13,277
13,584
06/19
11,738
11,063
14,198
14,941
06/20
10,481
9,878
14,681
16,602
06/21
15,680
14,778
20,505
22,843
06/22
13,190
12,432
17,646
17,107
06/23
15,049
14,184
21,022
20,446
06/24
15,102
14,234
25,384
24,660
06/25
17,694
16,676
29,639
28,105
06/26
20,072
18,917
36,103
31,200
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli Global Rising Income and Dividend Fund - Class A
4.93%
13.44%
5.06%
7.22%
The Gabelli Global Rising Income and Dividend Fund - Class A (includes sales charge)
(1.10)%
6.92%
3.83%
6.58%
MSCI World Index
9.94%
21.81%
11.98%
13.70%
Lipper Global Large-Cap Growth Fund Classification
6.29%
11.01%
6.43%
12.05%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 73,146,316
Holdings Count | Holding 184
Advisory Fees Paid, Amount $ 207,014
InvestmentCompanyPortfolioTurnover 7.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$73,146,316
  • Number of Portfolio Holdings184
  • Portfolio Turnover Rate7%
  • Management Fees$207,014
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
95.4%
U.S. Government Obligations
4.2%
Rights
0.1%
Preferred Stocks
0.1%
Other Assets and Liabilities (Net)
0.2%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Financial Services
14.7%
Food and Beverage
9.7%
Diversified Industrial
8.2%
Energy and Utilities
5.8%
Wireless Telecommunication Services
5.4%
Electronics
5.1%
Entertainment
4.9%
Telecommunication Services
4.6%
Other Industry sectors
41.4%
Other Assets and Liabilities (Net)
0.2%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Sony Group Corp.
5.1%
Berkshire Hathaway Inc.
3.1%
Rolls-Royce Holdings plc
2.6%
Rogers Communications Inc.
2.3%
CNH Industrial NV, New York
2.1%
Mueller Industries Inc.
2.1%
Millicom International Cellular SA
2.1%
The Bank of New York Mellon Corp.
2.0%
Nestlé SA
1.9%
Traton SE
1.8%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GAGAX/
C000002873  
Shareholder Report [Line Items]  
Fund Name The Gabelli International Small Cap Fund
Class Name Class AAA
Trading Symbol GABOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli International Small Cap Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GABOX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GABOX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli International Small Cap Fund - Class AAA
$46
0.93%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.93%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli International Small Cap Fund underperformed its benchmarks, the MSCI EAFE and  MSCI EAFE Small Cap Indices. For the second quarter global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. The equity market advance was broad by both geography and sector. Contributors included Nitto Boeski Co., Glanbia Plc, and Polar Capital Holdings Plc.  Detractors included Westgold Resources Ltd, Genius Sports Limited, and Alamos Gold Inc. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli International Small Cap Fund - Class AAA
MSCI EAFE Index
MSCI EAFE Small Cap Index
06/16
10,000
10,000
10,000
06/17
11,311
12,083
12,364
06/18
12,140
12,974
13,953
06/19
11,124
13,181
13,120
06/20
11,444
12,558
12,701
06/21
15,894
16,692
17,971
06/22
11,024
13,799
13,723
06/23
12,399
16,477
15,192
06/24
11,972
18,469
16,453
06/25
14,212
21,855
20,252
06/26
16,136
26,401
23,884
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli International Small Cap Fund - Class AAA
(0.51)%
13.53%
0.30%
4.90%
MSCI EAFE Index
9.84%
20.80%
9.60%
10.20%
MSCI EAFE Small Cap Index
7.99%
17.93%
5.86%
9.10%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 6,359,021
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ (52,776)
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$6,359,021
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate14%
  • Management Fees$(52,776)
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
97.2%
Preferred Stocks
2.7%
U.S. Government Obligations
1.6%
Other Assets and Liabilities (Net)
(1.5)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Materials
26.3%
Industrials
23.7%
Consumer Staples
13.2%
Information Technology
9.3%
Health Care
9.3%
Consumer Discretionary
8.5%
Financials
8.2%
U.S. Government Obligations
1.6%
Other Industry sectors
1.4%
Other Assets and Liabilities (Net)
(1.5)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Endeavour Mining plc
4.8%
Chemring Group plc
4.3%
Westgold Resources Ltd.
4.1%
Perseus Mining Ltd.
3.9%
Nitto Boseki Co. Ltd.
3.8%
Alamos Gold Inc.
3.5%
Eldorado Gold Corp.
3.4%
Polar Capital Holdings plc
3.2%
Loomis AB
3.1%
Glanbia plc
3.1%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GABOX/
C000002871  
Shareholder Report [Line Items]  
Fund Name The Gabelli International Small Cap Fund
Class Name Class C
Trading Symbol GGLCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli International Small Cap Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GGLCX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GGLCX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli International Small Cap Fund - Class C
$46
0.92%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.92%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli International Small Cap Fund underperformed its benchmarks, the MSCI EAFE and  MSCI EAFE Small Cap Indices. For the second quarter global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. The equity market advance was broad by both geography and sector. Contributors included Nitto Boeski Co., Glanbia Plc, and Polar Capital Holdings Plc.  Detractors included Westgold Resources Ltd, Genius Sports Limited, and Alamos Gold Inc. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli International Small Cap Fund - Class C
The Gabelli International Small Cap Fund - Class C (includes sales charge)
MSCI EAFE Index
MSCI EAFE Small Cap Index
06/16
10,000
10,000
10,000
10,000
06/17
11,274
11,274
12,083
12,364
06/18
11,913
11,913
12,974
13,953
06/19
10,726
10,726
13,181
13,120
06/20
10,953
10,953
12,558
12,701
06/21
15,209
15,209
16,692
17,971
06/22
10,558
10,558
13,799
13,723
06/23
11,867
11,867
16,477
15,192
06/24
11,464
11,464
18,469
16,453
06/25
13,603
13,603
21,855
20,252
06/26
15,445
15,445
26,401
23,884
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli International Small Cap Fund - Class C
(0.50)%
13.54%
0.31%
4.44%
The Gabelli International Small Cap Fund - Class C (includes sales charge)
(1.50)%
12.54%
0.31%
4.44%
MSCI EAFE Index
9.84%
20.80%
9.60%
10.20%
MSCI EAFE Small Cap Index
7.99%
17.93%
5.86%
9.10%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 6,359,021
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ (52,776)
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$6,359,021
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate14%
  • Management Fees$(52,776)
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
97.2%
Preferred Stocks
2.7%
U.S. Government Obligations
1.6%
Other Assets and Liabilities (Net)
(1.5)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Materials
26.3%
Industrials
23.7%
Consumer Staples
13.2%
Information Technology
9.3%
Health Care
9.3%
Consumer Discretionary
8.5%
Financials
8.2%
U.S. Government Obligations
1.6%
Other Industry sectors
1.4%
Other Assets and Liabilities (Net)
(1.5)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Endeavour Mining plc
4.8%
Chemring Group plc
4.3%
Westgold Resources Ltd.
4.1%
Perseus Mining Ltd.
3.9%
Nitto Boseki Co. Ltd.
3.8%
Alamos Gold Inc.
3.5%
Eldorado Gold Corp.
3.4%
Polar Capital Holdings plc
3.2%
Loomis AB
3.1%
Glanbia plc
3.1%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GGLCX/
C000034310  
Shareholder Report [Line Items]  
Fund Name The Gabelli International Small Cap Fund
Class Name Class I
Trading Symbol GLOIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli International Small Cap Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GLOIX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GLOIX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli International Small Cap Fund - Class I
$46
0.93%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.93%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli International Small Cap Fund underperformed its benchmarks, the MSCI EAFE and  MSCI EAFE Small Cap Indices. For the second quarter global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. The equity market advance was broad by both geography and sector. Contributors included Nitto Boeski Co., Glanbia Plc, and Polar Capital Holdings Plc.  Detractors included Westgold Resources Ltd, Genius Sports Limited, and Alamos Gold Inc. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli International Small Cap Fund - Class I
MSCI EAFE Index
MSCI EAFE Small Cap Index
06/16
10,000
10,000
10,000
06/17
11,373
12,083
12,364
06/18
12,226
12,974
13,953
06/19
11,207
13,181
13,120
06/20
11,525
12,558
12,701
06/21
16,006
16,692
17,971
06/22
11,104
13,799
13,723
06/23
12,481
16,477
15,192
06/24
12,063
18,469
16,453
06/25
14,318
21,855
20,252
06/26
16,253
26,401
23,884
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli International Small Cap Fund - Class I
(0.50)%
13.51%
0.31%
4.98%
MSCI EAFE Index
9.84%
20.80%
9.60%
10.20%
MSCI EAFE Small Cap Index
7.99%
17.93%
5.86%
9.10%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 6,359,021
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ (52,776)
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$6,359,021
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate14%
  • Management Fees$(52,776)
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
97.2%
Preferred Stocks
2.7%
U.S. Government Obligations
1.6%
Other Assets and Liabilities (Net)
(1.5)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Materials
26.3%
Industrials
23.7%
Consumer Staples
13.2%
Information Technology
9.3%
Health Care
9.3%
Consumer Discretionary
8.5%
Financials
8.2%
U.S. Government Obligations
1.6%
Other Industry sectors
1.4%
Other Assets and Liabilities (Net)
(1.5)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Endeavour Mining plc
4.8%
Chemring Group plc
4.3%
Westgold Resources Ltd.
4.1%
Perseus Mining Ltd.
3.9%
Nitto Boseki Co. Ltd.
3.8%
Alamos Gold Inc.
3.5%
Eldorado Gold Corp.
3.4%
Polar Capital Holdings plc
3.2%
Loomis AB
3.1%
Glanbia plc
3.1%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GLOIX/
C000002872  
Shareholder Report [Line Items]  
Fund Name The Gabelli International Small Cap Fund
Class Name Class A
Trading Symbol GOCAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli International Small Cap Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund, including the Fund’s prospectus, financial information, holdings, and proxy voting information, at https://gabelli.com/ticker/GOCAX/. You can also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website https://gabelli.com/ticker/GOCAX/
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Table Summary
Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli International Small Cap Fund - Class A
$46
0.93%
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.93%
Factors Affecting Performance [Text Block]

How did the Fund perform?

For the six months ended June 30, 2026, the Gabelli International Small Cap Fund underperformed its benchmarks, the MSCI EAFE and  MSCI EAFE Small Cap Indices. For the second quarter global equity markets enjoyed a very strong performance as the conflict in the Middle East was scaled back which resulted in much lower oil prices.  Corporate earnings grew sharply helped by the resilience of the global economy. The equity market advance was broad by both geography and sector. Contributors included Nitto Boeski Co., Glanbia Plc, and Polar Capital Holdings Plc.  Detractors included Westgold Resources Ltd, Genius Sports Limited, and Alamos Gold Inc. 
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
Table Summary
The Gabelli International Small Cap Fund - Class A
The Gabelli International Small Cap Fund - Class A (includes sales charge)
MSCI EAFE Index
MSCI EAFE Small Cap Index
06/16
10,000
10,000
10,000
10,000
06/17
11,316
10,666
12,083
12,364
06/18
12,049
11,357
12,974
13,953
06/19
10,928
10,300
13,181
13,120
06/20
11,193
10,550
12,558
12,701
06/21
15,547
14,654
16,692
17,971
06/22
10,791
10,171
13,799
13,723
06/23
12,130
11,433
16,477
15,192
06/24
11,711
11,039
18,469
16,453
06/25
13,908
13,109
21,855
20,252
06/26
15,784
14,877
26,401
23,884
Average Annual Return [Table Text Block]
Table Summary
6 months
1 Year
5 Year
10 Year
The Gabelli International Small Cap Fund - Class A
(0.51)%
13.49%
0.30%
4.67%
The Gabelli International Small Cap Fund - Class A (includes sales charge)
(6.23)%
6.96%
(0.88)%
4.05%
MSCI EAFE Index
9.84%
20.80%
9.60%
10.20%
MSCI EAFE Small Cap Index
7.99%
17.93%
5.86%
9.10%
No Deduction of Taxes [Text Block] The table and graph presented above do not reflect the deduction of taxes a shareholder would pay on Fund distributions or the redemption of Fund shares.
AssetsNet $ 6,359,021
Holdings Count | Holding 52
Advisory Fees Paid, Amount $ (52,776)
InvestmentCompanyPortfolioTurnover 14.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$6,359,021
  • Number of Portfolio Holdings52
  • Portfolio Turnover Rate14%
  • Management Fees$(52,776)
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Table Summary
Common Stocks
97.2%
Preferred Stocks
2.7%
U.S. Government Obligations
1.6%
Other Assets and Liabilities (Net)
(1.5)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Table Summary
Industry Weighting
.
Materials
26.3%
Industrials
23.7%
Consumer Staples
13.2%
Information Technology
9.3%
Health Care
9.3%
Consumer Discretionary
8.5%
Financials
8.2%
U.S. Government Obligations
1.6%
Other Industry sectors
1.4%
Other Assets and Liabilities (Net)
(1.5)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Table Summary
Endeavour Mining plc
4.8%
Chemring Group plc
4.3%
Westgold Resources Ltd.
4.1%
Perseus Mining Ltd.
3.9%
Nitto Boseki Co. Ltd.
3.8%
Alamos Gold Inc.
3.5%
Eldorado Gold Corp.
3.4%
Polar Capital Holdings plc
3.2%
Loomis AB
3.1%
Glanbia plc
3.1%
Material Fund Change [Text Block]
Updated Prospectus Phone Number 800-GABELLI (800-422-3554)
Updated Prospectus Email Address <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 400; grid-area: auto; line-height: 18px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@gabelli.com</span>
Updated Prospectus Web Address https://gabelli.com/ticker/GOCAX/