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.
Outgoing Juventus JUVE.MI Chairman Andrea Agnelli said on Tuesday his decision to stand down from the top job at the Serie A club was not an easy one to take, and he remained convinced he had acted correctly.
Juventus swept aside Bologna 3-0 on Sunday to ease their recent troubles as Atalanta continued their dream start to the Serie A season with a 1-0 win over Fiorentina which kept them level on points with leaders Napoli.
Monza took a surprising but deserved 1-0 home win over Juventus on Sunday, their first Serie A victory of the season, as the visitors struggled after being reduced to 10 men.
Juventus came back from two goals down at half-time to draw an incident-packed match with Salernitana 2-2 on Sunday as Atalanta gave up the Serie A lead after a 1-1 draw with Cremonese.
Paulo Dybala shot Roma top of Serie A on Tuesday with a brace which sank Monza 3-0 while Inter Milan are one point behind Jose Mourinho's side after their 3-1 home win over Cremonese.
Barcelona's French defender Samuel Umtiti will join Serie A side Lecce on loan until the end of the season, the Spanish club announced on Thursday.
Juventus were held to an uneventful goalless draw by Sampdoria on Monday, while Chris Smalling headed Roma to a 1-0 win over Cremonese to make it two wins from two.
Argentina winger Angel Di Maria faces a spell on the sidelines after picking up a thigh injury on his Juventus debut, the Serie A club said on Tuesday.
AC Milan began their Italian title defence with a 4-2 win over Udinese on Saturday as the new Serie A season got underway.
Argentina international forward Paulo Dybala has joined Italian side AS Roma on a three-year contract following his departure from Juventus, the Europa Conference League champions said on Wednesday.