Limerick businessman JP McManus is to donate €1 million to each county, to be divided between clubs across the three associations of Gaelic Games.
The funds will be given to county boards, to be divided equally between GAA, Ladies Football and Camogie clubs.
McManus previously donated €100,000 to each GAA county board following Limerick triumph in the 2018 All-Ireland Senior Hurling Championship.
The three associations issued statements on Thursday, thanking the McManus family for their generosity and support of Gaelic Games.
"The GAA would like to acknowledge and thank JP McManus, his wife Noreen, and their children for their incredible generosity," the GAA's statement read.
Describing the donation as "yet another remarkable gesture of support", GAA president Larry McCarthy and director general Tom Ryan added: "Clubs across the island benefitted greatly from the generosity of JP and his family in 2018, and we know that the funds were put to very good use at the time."
The LGFA said the money will help support men's and women's clubs equally, adding: "Clubs across the island benefitted greatly from the generosity of JP and his family in 2018, and we know that the funds were put to very good use at the time".
LGFA president Mícheál Naughton said: "We all know how much JP loves Gaelic Games, and this money will provide invaluable support to clubs at grassroots levels across the country."
The Camogie Association said the donation demonstrated the McManus family's "extraordinary generosity", adding it is "a testament to their unwavering commitment to the community and the spirit of the Gaelic Games".
