diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php
index c8f1189909a01..d8663a57b76d2 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php
@@ -99,12 +99,13 @@ protected function doDestroy($sessionId)
     }
 
     /**
-     * @return bool
+     * @return int|false
      */
+    #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
         // not required here because memcached will auto expire the records anyhow.
-        return true;
+        return 0;
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MigratingSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MigratingSessionHandler.php
index c3e7ef6e60a30..a4f28ef21bf43 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MigratingSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MigratingSessionHandler.php
@@ -63,7 +63,7 @@ public function destroy($sessionId)
     }
 
     /**
-     * @return bool
+     * @return int|false
      */
     #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php
index 6cb8847786538..772a3e56bb386 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php
@@ -100,15 +100,14 @@ protected function doDestroy($sessionId)
     }
 
     /**
-     * @return bool
+     * @return int|false
      */
+    #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
-        $this->getCollection()->deleteMany([
+        return $this->getCollection()->deleteMany([
             $this->options['expiry_field'] => ['$lt' => new \MongoDB\BSON\UTCDateTime()],
-        ]);
-
-        return true;
+        ])->getDeletedCount();
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/NullSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/NullSessionHandler.php
index c34c25edbb38b..a85ab658698a4 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/NullSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/NullSessionHandler.php
@@ -70,11 +70,11 @@ protected function doDestroy($sessionId)
     }
 
     /**
-     * @return bool
+     * @return int|false
      */
     #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
-        return true;
+        return 0;
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
index d3c5651d41300..5fec9b17ecdc9 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
@@ -290,7 +290,7 @@ public function read($sessionId)
     }
 
     /**
-     * @return bool
+     * @return int|false
      */
     #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
@@ -299,7 +299,7 @@ public function gc($maxlifetime)
         // This way, pruning expired sessions does not block them from being started while the current session is used.
         $this->gcCalled = true;
 
-        return true;
+        return 0;
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php
index 699d6da6f65ef..a9c4e392e94c7 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php
@@ -104,10 +104,13 @@ public function close(): bool
 
     /**
      * {@inheritdoc}
+     *
+     * @return int|false
      */
-    public function gc($maxlifetime): bool
+    #[\ReturnTypeWillChange]
+    public function gc($maxlifetime)
     {
-        return true;
+        return 0;
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php
index de5188d42ce91..3dcb3c51dbba3 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php
@@ -114,7 +114,7 @@ public function testDestroySession()
 
     public function testGcSession()
     {
-        $this->assertTrue($this->storage->gc(123));
+        $this->assertIsInt($this->storage->gc(123));
     }
 
     public function testUpdateTimestamp()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/common.inc b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/common.inc
index a887f607e899a..fd662e3a16236 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/common.inc
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/common.inc
@@ -121,11 +121,12 @@ class TestSessionHandler extends AbstractSessionHandler
         return true;
     }
 
-    public function gc($maxLifetime): bool
+    #[\ReturnTypeWillChange]
+    public function gc($maxLifetime)
     {
         echo __FUNCTION__, "\n";
 
-        return true;
+        return 1;
     }
 
     protected function doRead($sessionId): string
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
index 200567a29d4ac..d404b74c6a5f4 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
@@ -113,7 +113,7 @@ public function testDestroySession()
 
     public function testGcSession()
     {
-        $this->assertTrue($this->storage->gc(123));
+        $this->assertIsInt($this->storage->gc(123));
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
index 01b92dfa22046..bf8021c155309 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
@@ -184,9 +184,14 @@ public function testGc()
             ->willReturnCallback(function ($criteria) {
                 $this->assertInstanceOf(\MongoDB\BSON\UTCDateTime::class, $criteria[$this->options['expiry_field']]['$lt']);
                 $this->assertGreaterThanOrEqual(time() - 1, round((string) $criteria[$this->options['expiry_field']]['$lt'] / 1000));
+
+                $result = $this->createMock(\MongoDB\DeleteResult::class);
+                $result->method('getDeletedCount')->willReturn(42);
+
+                return $result;
             });
 
-        $this->assertTrue($this->storage->gc(1));
+        $this->assertSame(42, $this->storage->gc(1));
     }
 
     public function testGetConnection()