v3.25.2
Shareholder Report
 6 Months Ended
Jun. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Gabelli Growth Fund
Entity Central Index Key 0000806857
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
C000002893  
Shareholder Report [Line Items]  
Fund Name The Gabelli Growth Fund
Class Name Class AAA
Trading Symbol GABGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Growth Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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;">www.gabelli.com/funds/open_ends</span>
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Growth Fund - Class AAA
$70
1.34%
Expenses Paid, Amount $ 70
Expense Ratio, Percent 1.34%
Factors Affecting Performance [Text Block]

How did the Fund perform?

In the first half of 2025, the Gabelli Growth Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Growth Index. The Trump Administration’s reciprocal tariff program introduced in early-April could result in higher prices and slower growth if enacted. Absent these risks, the US economy remains on stable footing, underpinned by low unemployment and positive GDP growth. Separately, the artificial intelligence space has seen end user adoption inflect positively this year, prompting large infrastructure investments from scaled players. Against this backdrop, many of our large technology holdings performed well.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Growth Fund - Class AAA
S&P 500 Index
Russell 1000 Growth Index
6/15
10,000
10,000
10,000
6/16
10,106
10,399
10,302
6/17
12,010
12,260
12,406
6/18
15,102
14,022
15,198
6/19
16,901
15,483
16,955
6/20
20,933
16,646
20,902
6/21
28,627
23,436
29,786
6/22
20,846
20,947
24,195
6/23
25,525
25,051
30,754
6/24
35,649
31,203
41,051
6/25
42,096
35,934
48,120
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Growth Fund - Class AAA
10.80%
18.08%
15.00%
15.46%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Growth Index
6.09%
17.22%
18.15%
17.01%
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 $ 1,269,817,573
Holdings Count | Holding 46
Advisory Fees Paid, Amount $ 5,719,425
InvestmentCompanyPortfolioTurnover 3.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$1,269,817,573
  • Number of Portfolio Holdings46
  • Portfolio Turnover Rate3%
  • Management Fees$5,719,425
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
97.0%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.9)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Technology - Software
20.9%
Consumer Discretionary
16.4%
Technology - Semiconductors
16.0%
Technology - Computer Services
11.7%
Financials
8.7%
Health Care
8.1%
Industrials
6.8%
Technology - Hardware and Equipment
6.5%
Other Industry sectors
5.8%
Other Assets and Liabilities (Net)
(0.9)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Microsoft Corp.
13.1%
NVIDIA Corp.
12.2%
Amazon.com Inc.
7.8%
Alphabet Inc.
6.0%
Meta Platforms Inc.
5.7%
Netflix Inc.
5.0%
Apple Inc.
4.7%
Broadcom Inc.
3.8%
Eli Lilly & Co.
3.0%
General Electric Co.
2.9%
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 <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;">www.gabelli.com/funds/open_ends</span>
C000002895  
Shareholder Report [Line Items]  
Fund Name The Gabelli Growth Fund
Class Name Class C
Trading Symbol GGCCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Growth Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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;">www.gabelli.com/funds/open_ends</span>
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Growth Fund - Class C
$109
2.09%
Expenses Paid, Amount $ 109
Expense Ratio, Percent 2.09%
Factors Affecting Performance [Text Block]

How did the Fund perform?

In the first half of 2025, the Gabelli Growth Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Growth Index. The Trump Administration’s reciprocal tariff program introduced in early-April could result in higher prices and slower growth if enacted. Absent these risks, the US economy remains on stable footing, underpinned by low unemployment and positive GDP growth. Separately, the artificial intelligence space has seen end user adoption inflect positively this year, prompting large infrastructure investments from scaled players. Against this backdrop, many of our large technology holdings performed well.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Growth Fund - Class C
The Gabelli Growth Fund - Class C (includes sales charge)
S&P 500 Index
Russell 1000 Growth Index
6/15
10,000
10,000
10,000
10,000
6/16
10,030
9,930
10,399
10,302
6/17
11,828
11,611
12,260
12,406
6/18
14,766
14,379
14,022
15,198
6/19
16,402
15,828
15,483
16,955
6/20
20,164
19,300
16,646
20,902
6/21
27,364
25,999
23,436
29,786
6/22
19,778
18,603
20,947
24,195
6/23
24,037
22,424
25,051
30,754
6/24
33,319
30,858
31,203
41,051
6/25
39,057
35,863
35,934
48,120
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Growth Fund - Class C
10.40%
17.22%
14.14%
14.60%
The Gabelli Growth Fund - Class C (includes sales charge)
9.40%
16.22%
14.14%
14.60%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Growth Index
6.09%
17.22%
18.15%
17.01%
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 $ 1,269,817,573
Holdings Count | Holding 46
Advisory Fees Paid, Amount $ 5,719,425
InvestmentCompanyPortfolioTurnover 3.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$1,269,817,573
  • Number of Portfolio Holdings46
  • Portfolio Turnover Rate3%
  • Management Fees$5,719,425
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
97.0%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.9)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Technology - Software
20.9%
Consumer Discretionary
16.4%
Technology - Semiconductors
16.0%
Technology - Computer Services
11.7%
Financials
8.7%
Health Care
8.1%
Industrials
6.8%
Technology - Hardware and Equipment
6.5%
Other Industry sectors
5.8%
Other Assets and Liabilities (Net)
(0.9)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Microsoft Corp.
13.1%
NVIDIA Corp.
12.2%
Amazon.com Inc.
7.8%
Alphabet Inc.
6.0%
Meta Platforms Inc.
5.7%
Netflix Inc.
5.0%
Apple Inc.
4.7%
Broadcom Inc.
3.8%
Eli Lilly & Co.
3.0%
General Electric Co.
2.9%
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 <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;">www.gabelli.com/funds/open_ends</span>
C000002896  
Shareholder Report [Line Items]  
Fund Name The Gabelli Growth Fund
Class Name Class I
Trading Symbol GGCIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Growth Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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;">www.gabelli.com/funds/open_ends</span>
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Growth Fund - Class I
$57
1.09%
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.09%
Factors Affecting Performance [Text Block]

How did the Fund perform?

In the first half of 2025, the Gabelli Growth Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Growth Index. The Trump Administration’s reciprocal tariff program introduced in early-April could result in higher prices and slower growth if enacted. Absent these risks, the US economy remains on stable footing, underpinned by low unemployment and positive GDP growth. Separately, the artificial intelligence space has seen end user adoption inflect positively this year, prompting large infrastructure investments from scaled players. Against this backdrop, many of our large technology holdings performed well.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Growth Fund - Class I
S&P 500 Index
Russell 1000 Growth Index
6/15
10,000
10,000
10,000
6/16
10,131
10,399
10,302
6/17
12,069
12,260
12,406
6/18
15,216
14,022
15,198
6/19
17,069
15,483
16,955
6/20
21,198
16,646
20,902
6/21
29,058
23,436
29,786
6/22
21,216
20,947
24,195
6/23
26,040
25,051
30,754
6/24
36,453
31,203
41,051
6/25
43,156
35,934
48,120
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Growth Fund - Class I
10.94%
18.39%
15.28%
15.75%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Growth Index
6.09%
17.22%
18.15%
17.01%
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 $ 1,269,817,573
Holdings Count | Holding 46
Advisory Fees Paid, Amount $ 5,719,425
InvestmentCompanyPortfolioTurnover 3.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$1,269,817,573
  • Number of Portfolio Holdings46
  • Portfolio Turnover Rate3%
  • Management Fees$5,719,425
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
97.0%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.9)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Technology - Software
20.9%
Consumer Discretionary
16.4%
Technology - Semiconductors
16.0%
Technology - Computer Services
11.7%
Financials
8.7%
Health Care
8.1%
Industrials
6.8%
Technology - Hardware and Equipment
6.5%
Other Industry sectors
5.8%
Other Assets and Liabilities (Net)
(0.9)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Microsoft Corp.
13.1%
NVIDIA Corp.
12.2%
Amazon.com Inc.
7.8%
Alphabet Inc.
6.0%
Meta Platforms Inc.
5.7%
Netflix Inc.
5.0%
Apple Inc.
4.7%
Broadcom Inc.
3.8%
Eli Lilly & Co.
3.0%
General Electric Co.
2.9%
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 <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;">www.gabelli.com/funds/open_ends</span>
C000002892  
Shareholder Report [Line Items]  
Fund Name The Gabelli Growth Fund
Class Name Class A
Trading Symbol GGCAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about The Gabelli Growth Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You may find additional information about the Fund at www.gabelli.com/funds/open_ends. You may also request  information by contacting us at 800-GABELLI (800-422-3554).
Additional Information Phone Number 800-GABELLI (800-422-3554)
Additional Information Website <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;">www.gabelli.com/funds/open_ends</span>
Expenses [Text Block]

What were the Fund costs for the last six months? 

(based on a hypothetical $10,000 investment)

Class Name
Costs of a $10k Investment
Costs Paid as a % of a $10k Investment
The Gabelli Growth Fund - Class A
$70
1.34%
Expenses Paid, Amount $ 70
Expense Ratio, Percent 1.34%
Factors Affecting Performance [Text Block]

How did the Fund perform?

In the first half of 2025, the Gabelli Growth Fund outperformed its broad-based benchmark, the S&P 500 Index and its comparative benchmark, the Russell 1000 Growth Index. The Trump Administration’s reciprocal tariff program introduced in early-April could result in higher prices and slower growth if enacted. Absent these risks, the US economy remains on stable footing, underpinned by low unemployment and positive GDP growth. Separately, the artificial intelligence space has seen end user adoption inflect positively this year, prompting large infrastructure investments from scaled players. Against this backdrop, many of our large technology holdings performed well.
Performance Past Does Not Indicate Future [Text] Past performance does not guarantee future results.
Line Graph [Table Text Block]
Growth of 10K Chart
The Gabelli Growth Fund - Class A
The Gabelli Growth Fund - Class A (includes sales charge)
S&P 500 Index
Russell 1000 Growth Index
6/15
10,000
10,000
10,000
10,000
6/16
10,106
9,525
10,399
10,302
6/17
12,010
10,669
12,260
12,406
6/18
15,104
12,646
14,022
15,198
6/19
16,903
13,338
15,483
16,955
6/20
20,935
15,569
16,646
20,902
6/21
28,627
20,066
23,436
29,786
6/22
20,848
13,773
20,947
24,195
6/23
25,529
15,896
25,051
30,754
6/24
35,654
20,924
31,203
41,051
6/25
42,103
23,288
35,934
48,120
Average Annual Return [Table Text Block]
6 months
1 Year
5 Year
10 Year
The Gabelli Growth Fund - Class A
10.80%
18.09%
15.00%
15.46%
The Gabelli Growth Fund - Class A (includes sales charge)
4.43%
11.30%
13.64%
14.78%
S&P 500 Index
6.20%
15.16%
16.64%
13.65%
Russell 1000 Growth Index
6.09%
17.22%
18.15%
17.01%
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 $ 1,269,817,573
Holdings Count | Holding 46
Advisory Fees Paid, Amount $ 5,719,425
InvestmentCompanyPortfolioTurnover 3.00%
Additional Fund Statistics [Text Block]

Fund Statistics

  • Total Net Assets$1,269,817,573
  • Number of Portfolio Holdings46
  • Portfolio Turnover Rate3%
  • Management Fees$5,719,425
Holdings [Text Block]

Portfolio Weighting (% of net assets)

Common Stocks
97.0%
U.S. Government Obligations
3.9%
Other Assets and Liabilities (Net)
(0.9)%

Industry Allocation (% of net assets)

Bar Graph showing Allocation by Industry
Industry Weighting
.
Technology - Software
20.9%
Consumer Discretionary
16.4%
Technology - Semiconductors
16.0%
Technology - Computer Services
11.7%
Financials
8.7%
Health Care
8.1%
Industrials
6.8%
Technology - Hardware and Equipment
6.5%
Other Industry sectors
5.8%
Other Assets and Liabilities (Net)
(0.9)%
Largest Holdings [Text Block]

Top 10 Holdings (% of net assets)

Microsoft Corp.
13.1%
NVIDIA Corp.
12.2%
Amazon.com Inc.
7.8%
Alphabet Inc.
6.0%
Meta Platforms Inc.
5.7%
Netflix Inc.
5.0%
Apple Inc.
4.7%
Broadcom Inc.
3.8%
Eli Lilly & Co.
3.0%
General Electric Co.
2.9%
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 <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;">www.gabelli.com/funds/open_ends</span>