Defender Gabbia rose highest to thump home Tijjani Reijnders' free-kick in the 89th minute and give Milan a Serie A win which pulls them out of a miserable early season slump.
Juventus were held to a 0-0 Serie A draw at Empoli on Saturday as Thiago Motta's side dropped more points after their goalless home stalemate against AS Roma before the international break.
Inter and AC Milan on Friday rejected the project to modernise and restructure the iconic San Siro stadium which they share, city mayor Giuseppe Sala announced.
Victor Osimhen has been sidelined by Napoli after the team he fired to Serie A glory just a over year ago left him both off their squad list for the 2024/25 campaign and potentially in season-long limbo.
Belgium striker Lukaku completed a permanent move to Napoli from Chelsea on Thursday, ending a long period of limbo with the Blues.
Inter Milan thrashed Atalanta 4-0 on Friday to move provisionally top of Serie A, while Torino snatched a late 1-0 win at Venezia to continue their positive start to the campaign.
The futures of Napoli striker Victor Osimhen and England international Ivan Toney are set to dominate the final day of the European transfer window on Friday as Chelsea continue their frenzied pursuit of new signings.
Napoli have signed Romelu Lukaku from Chelsea, the Serie A club announced on Thursday, ending the Belgium striker's extended period in limbo with the Blues.
Poland goalkeeper Wojciech Szczesny on Tuesday announced he was retiring from football at the age of 34 less than two weeks after the end of his contract with Juventus.
Mauro Icardi scored on his first Inter Milan appearance in almost two months to help his side extend their lead in third place with a 4-0 Serie A win away to 10-man Genoa on Wednesday.
Champions Juventus keep pace with Serie A leaders Napoli after a hard-fought 1-0 win over title-rivals AS Roma with Inter Milan suffering a second consecutive defeat.
Juventus move to second in Serie A after a trademark Miralem Pjanic free-kick led the reigning champions to a comfortable 3-0 win at Bologna while AC Milan were plunged further into crisis by a heavy loss at lowly Verona.
New AC Milan coach Gennaro Gattuso says Benevento goalkeeper Alberto Brignoli's last-gasp equaliser against his team felt worse than being stabbed after the newly-promoted side gained their first ever Serie A point.
AS Roma coach Luciano Spalletti parts company with the club despite leading them to second place in Serie A this season with a club-record points haul.
Roma coach Luciano Spalletti said securing a win, and not giving Francesco Totti a full game on his swansong, remains the priority in their final match of the season at home to Genoa.
Japan midfielder Keisuke Honda confirms his departure from fallen Serie A giants AC Milan at the end of the season.
Inter Milan avoided setting an unwanted club record of nine league matches without a win by beating Lazio 3-1 away on Sunday after their opponents had two players sent off.
Two goals each from Stephan El Shaarawy and Mohamed Salah keep Roma's Serie A title hopes alive as they twice came from behind to win 5-3 at Chievo Verona, while Napoli also stays in the running with a 4-1 home win over Fiorentina.
AS Roma provided an unexpected twist to the Serie A title race on Sunday with a 3-1 over leaders Juventus, who had needed only a draw to wrap up their sixth successive title with two games to spare.