diff --git a/packages/google_maps_flutter/google_maps_flutter_android/example/integration_test/google_maps_tests.dart b/packages/google_maps_flutter/google_maps_flutter_android/example/integration_test/google_maps_tests.dart
index 952c381df53..4f54bfa1cc1 100644
--- a/packages/google_maps_flutter/google_maps_flutter_android/example/integration_test/google_maps_tests.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_android/example/integration_test/google_maps_tests.dart
@@ -2009,6 +2009,7 @@ Marker _copyMarkerWithClusterManagerId(
     position: marker.position,
     rotation: marker.rotation,
     visible: marker.visible,
+    // The deprecated parameter is used here to avoid losing precision.
     zIndex: marker.zIndex,
     onTap: marker.onTap,
     onDragStart: marker.onDragStart,
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md b/packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md
index 532ebd289c6..5f48d675c98 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.15.4
+
+* Deprecates `zIndex` parameter in Marker in favor of `zIndexInt`.
+
 ## 2.15.3
 
 * Fixes new analysis warnings.
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/pubspec.yaml
index 55e93119742..96319023995 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/example/ios14/pubspec.yaml
@@ -18,7 +18,7 @@ dependencies:
     # The example app is bundled with the plugin so we use a path dependency on
     # the parent directory to use the current plugin's version.
     path: ../../
-  google_maps_flutter_platform_interface: ^2.11.0
+  google_maps_flutter_platform_interface: ^2.12.1
   maps_example_dart:
     path: ../shared/maps_example_dart/
 
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/pubspec.yaml
index 55e93119742..96319023995 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/example/ios15/pubspec.yaml
@@ -18,7 +18,7 @@ dependencies:
     # The example app is bundled with the plugin so we use a path dependency on
     # the parent directory to use the current plugin's version.
     path: ../../
-  google_maps_flutter_platform_interface: ^2.11.0
+  google_maps_flutter_platform_interface: ^2.12.1
   maps_example_dart:
     path: ../shared/maps_example_dart/
 
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/place_marker.dart b/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/place_marker.dart
index d282602d8dc..4291aec8c15 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/place_marker.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/lib/place_marker.dart
@@ -269,10 +269,10 @@ class PlaceMarkerBodyState extends State<PlaceMarkerBody> {
 
   Future<void> _changeZIndex(MarkerId markerId) async {
     final Marker marker = markers[markerId]!;
-    final double current = marker.zIndex;
+    final int current = marker.zIndexInt;
     setState(() {
       markers[markerId] = marker.copyWith(
-        zIndexParam: current == 12.0 ? 0.0 : current + 1.0,
+        zIndexIntParam: current == 12 ? 0 : current + 1,
       );
     });
   }
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/pubspec.yaml
index ccfab1b92ff..d1404b7077b 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/example/shared/maps_example_dart/pubspec.yaml
@@ -18,7 +18,7 @@ dependencies:
     # The example app is bundled with the plugin so we use a path dependency on
     # the parent directory to use the current plugin's version.
     path: ../../../
-  google_maps_flutter_platform_interface: ^2.11.0
+  google_maps_flutter_platform_interface: ^2.12.1
 
 dev_dependencies:
   flutter_test:
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapMarkerController.m b/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapMarkerController.m
index f86cb3620c2..d542f7f8ebe 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapMarkerController.m
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/GoogleMapMarkerController.m
@@ -121,7 +121,7 @@ - (void)updateFromPlatformMarker:(FGMPlatformMarker *)platformMarker
   [self setConsumeTapEvents:platformMarker.consumeTapEvents];
   [self setPosition:FGMGetCoordinateForPigeonLatLng(platformMarker.position)];
   [self setRotation:platformMarker.rotation];
-  [self setZIndex:platformMarker.zIndex];
+  [self setZIndex:(int)platformMarker.zIndex];
   FGMPlatformInfoWindow *infoWindow = platformMarker.infoWindow;
   [self setInfoWindowAnchor:FGMGetCGPointForPigeonPoint(infoWindow.anchor)];
   if (infoWindow.title) {
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.h b/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.h
index 0d1c3935e8a..48d44eac213 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.h
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.h
@@ -1,7 +1,7 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v22.7.4), do not edit directly.
+// Autogenerated from Pigeon (v22.6.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 #import <Foundation/Foundation.h>
@@ -283,7 +283,7 @@ typedef NS_ENUM(NSUInteger, FGMPlatformMapBitmapScaling) {
                      position:(FGMPlatformLatLng *)position
                      rotation:(double)rotation
                       visible:(BOOL)visible
-                       zIndex:(double)zIndex
+                       zIndex:(NSInteger)zIndex
                      markerId:(NSString *)markerId
              clusterManagerId:(nullable NSString *)clusterManagerId;
 @property(nonatomic, assign) double alpha;
@@ -296,7 +296,7 @@ typedef NS_ENUM(NSUInteger, FGMPlatformMapBitmapScaling) {
 @property(nonatomic, strong) FGMPlatformLatLng *position;
 @property(nonatomic, assign) double rotation;
 @property(nonatomic, assign) BOOL visible;
-@property(nonatomic, assign) double zIndex;
+@property(nonatomic, assign) NSInteger zIndex;
 @property(nonatomic, copy) NSString *markerId;
 @property(nonatomic, copy, nullable) NSString *clusterManagerId;
 @end
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.m b/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.m
index ccf0735ec94..be83df3604b 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.m
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/ios/Classes/messages.g.m
@@ -1,7 +1,7 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v22.7.4), do not edit directly.
+// Autogenerated from Pigeon (v22.6.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 #import "messages.g.h"
@@ -725,7 +725,7 @@ + (instancetype)makeWithAlpha:(double)alpha
                      position:(FGMPlatformLatLng *)position
                      rotation:(double)rotation
                       visible:(BOOL)visible
-                       zIndex:(double)zIndex
+                       zIndex:(NSInteger)zIndex
                      markerId:(NSString *)markerId
              clusterManagerId:(nullable NSString *)clusterManagerId {
   FGMPlatformMarker *pigeonResult = [[FGMPlatformMarker alloc] init];
@@ -756,7 +756,7 @@ + (FGMPlatformMarker *)fromList:(NSArray<id> *)list {
   pigeonResult.position = GetNullableObjectAtIndex(list, 7);
   pigeonResult.rotation = [GetNullableObjectAtIndex(list, 8) doubleValue];
   pigeonResult.visible = [GetNullableObjectAtIndex(list, 9) boolValue];
-  pigeonResult.zIndex = [GetNullableObjectAtIndex(list, 10) doubleValue];
+  pigeonResult.zIndex = [GetNullableObjectAtIndex(list, 10) integerValue];
   pigeonResult.markerId = GetNullableObjectAtIndex(list, 11);
   pigeonResult.clusterManagerId = GetNullableObjectAtIndex(list, 12);
   return pigeonResult;
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/google_maps_flutter_ios.dart b/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/google_maps_flutter_ios.dart
index ab76471fc19..de501b9f71d 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/google_maps_flutter_ios.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/google_maps_flutter_ios.dart
@@ -678,7 +678,7 @@ class GoogleMapsFlutterIOS extends GoogleMapsFlutterPlatform {
       position: _platformLatLngFromLatLng(marker.position),
       rotation: marker.rotation,
       visible: marker.visible,
-      zIndex: marker.zIndex,
+      zIndex: marker.zIndexInt,
       markerId: marker.markerId.value,
       clusterManagerId: marker.clusterManagerId?.value,
     );
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/messages.g.dart b/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/messages.g.dart
index c7b67e500c9..0a91b92465b 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/messages.g.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/lib/src/messages.g.dart
@@ -1,7 +1,7 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v22.7.4), do not edit directly.
+// Autogenerated from Pigeon (v22.6.0), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 // ignore_for_file: public_member_api_docs, non_constant_identifier_names, avoid_as, unused_import, unnecessary_parenthesis, prefer_null_aware_operators, omit_local_variable_types, unused_shown_name, unnecessary_import, no_leading_underscores_for_local_identifiers
 
@@ -508,7 +508,7 @@ class PlatformMarker {
     required this.position,
     this.rotation = 0.0,
     this.visible = true,
-    this.zIndex = 0.0,
+    this.zIndex = 0,
     required this.markerId,
     this.clusterManagerId,
   });
@@ -533,7 +533,7 @@ class PlatformMarker {
 
   bool visible;
 
-  double zIndex;
+  int zIndex;
 
   String markerId;
 
@@ -570,7 +570,7 @@ class PlatformMarker {
       position: result[7]! as PlatformLatLng,
       rotation: result[8]! as double,
       visible: result[9]! as bool,
-      zIndex: result[10]! as double,
+      zIndex: result[10]! as int,
       markerId: result[11]! as String,
       clusterManagerId: result[12] as String?,
     );
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/pigeons/messages.dart b/packages/google_maps_flutter/google_maps_flutter_ios/pigeons/messages.dart
index dcbe6691bd1..8f66adc44b8 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/pigeons/messages.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/pigeons/messages.dart
@@ -187,7 +187,7 @@ class PlatformMarker {
     required this.position,
     this.rotation = 0.0,
     this.visible = true,
-    this.zIndex = 0.0,
+    this.zIndex = 0,
     this.clusterManagerId,
   });
 
@@ -202,7 +202,7 @@ class PlatformMarker {
   final PlatformLatLng position;
   final double rotation;
   final bool visible;
-  final double zIndex;
+  final int zIndex;
   final String markerId;
   final String? clusterManagerId;
 }
diff --git a/packages/google_maps_flutter/google_maps_flutter_ios/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_ios/pubspec.yaml
index f7397a4ddc3..519276f1101 100644
--- a/packages/google_maps_flutter/google_maps_flutter_ios/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_ios/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_maps_flutter_ios
 description: iOS implementation of the google_maps_flutter plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter_ios
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 2.15.3
+version: 2.15.4
 
 environment:
   sdk: ^3.6.0
@@ -19,7 +19,7 @@ flutter:
 dependencies:
   flutter:
     sdk: flutter
-  google_maps_flutter_platform_interface: ^2.11.0
+  google_maps_flutter_platform_interface: ^2.12.1
   stream_transform: ^2.0.0
 
 dev_dependencies:
diff --git a/packages/google_maps_flutter/google_maps_flutter_web/CHANGELOG.md b/packages/google_maps_flutter/google_maps_flutter_web/CHANGELOG.md
index 41a9103221b..71dc609eadf 100644
--- a/packages/google_maps_flutter/google_maps_flutter_web/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter_web/CHANGELOG.md
@@ -1,5 +1,6 @@
-## NEXT
+## 0.5.12+1
 
+* Deprecates `zIndex` parameter in Marker in favor of `zIndexInt`.
 * Updates minimum supported SDK version to Flutter 3.27/Dart 3.6.
 
 ## 0.5.12
diff --git a/packages/google_maps_flutter/google_maps_flutter_web/example/integration_test/markers_test.dart b/packages/google_maps_flutter/google_maps_flutter_web/example/integration_test/markers_test.dart
index 45b218f139c..39e28509de7 100644
--- a/packages/google_maps_flutter/google_maps_flutter_web/example/integration_test/markers_test.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_web/example/integration_test/markers_test.dart
@@ -536,5 +536,20 @@ void main() {
       expect(icon2.anchor!.x, width * anchorOffset.dx);
       expect(icon2.anchor!.y, height * anchorOffset.dy);
     });
+
+    testWidgets('interpret correct zIndex in convertsion',
+        (WidgetTester tester) async {
+      const MarkerId markerId = MarkerId('1');
+
+      final Set<Marker> markers = <Marker>{
+        const Marker(markerId: markerId, zIndexInt: 4),
+      };
+
+      await controller.addMarkers(markers);
+
+      final gmaps.Marker? gmMarker = controller.markers[markerId]?.marker;
+      expect(gmMarker, isNotNull);
+      expect(gmMarker!.zIndex, 4);
+    });
   });
 }
diff --git a/packages/google_maps_flutter/google_maps_flutter_web/example/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_web/example/pubspec.yaml
index f1f0b079fc6..6d404825bc7 100644
--- a/packages/google_maps_flutter/google_maps_flutter_web/example/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_web/example/pubspec.yaml
@@ -8,7 +8,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  google_maps_flutter_platform_interface: ^2.10.0
+  google_maps_flutter_platform_interface: ^2.12.1
   google_maps_flutter_web:
     path: ../
   web: ^1.0.0
diff --git a/packages/google_maps_flutter/google_maps_flutter_web/lib/src/convert.dart b/packages/google_maps_flutter/google_maps_flutter_web/lib/src/convert.dart
index 88ae0fb849c..956ca751e93 100644
--- a/packages/google_maps_flutter/google_maps_flutter_web/lib/src/convert.dart
+++ b/packages/google_maps_flutter/google_maps_flutter_web/lib/src/convert.dart
@@ -272,6 +272,7 @@ gmaps.InfoWindowOptions? _infoWindowOptionsFromMarker(Marker marker) {
 
   return gmaps.InfoWindowOptions()
     ..content = container
+    // The deprecated parameter is used here to avoid losing precision.
     ..zIndex = marker.zIndex;
   // TODO(ditman): Compute the pixelOffset of the infoWindow, from the size of the Marker,
   // and the marker.infoWindow.anchor property.
@@ -453,8 +454,8 @@ Future<gmaps.Icon?> _gmIconFromBitmapDescriptor(
   return icon;
 }
 
-// Computes the options for a new [gmaps.Marker] from an incoming set of options
-// [marker], and the existing marker registered with the map: [currentMarker].
+/// Computes the options for a new [gmaps.Marker] from an incoming set of options
+/// [marker], and the existing marker registered with the map: [currentMarker].
 Future<gmaps.MarkerOptions> _markerOptionsFromMarker(
   Marker marker,
   gmaps.Marker? currentMarker,
@@ -465,6 +466,7 @@ Future<gmaps.MarkerOptions> _markerOptionsFromMarker(
       marker.position.longitude,
     )
     ..title = sanitizeHtml(marker.infoWindow.title ?? '')
+    // The deprecated parameter is used here to avoid losing precision.
     ..zIndex = marker.zIndex
     ..visible = marker.visible
     ..opacity = marker.alpha
diff --git a/packages/google_maps_flutter/google_maps_flutter_web/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_web/pubspec.yaml
index 5cbffaec962..c6e57e37f51 100644
--- a/packages/google_maps_flutter/google_maps_flutter_web/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_web/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_maps_flutter_web
 description: Web platform implementation of google_maps_flutter
 repository: https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/google_maps_flutter_web
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
-version: 0.5.12
+version: 0.5.12+1
 
 environment:
   sdk: ^3.6.0
@@ -23,7 +23,7 @@ dependencies:
   flutter_web_plugins:
     sdk: flutter
   google_maps: ^8.0.0
-  google_maps_flutter_platform_interface: ^2.10.0
+  google_maps_flutter_platform_interface: ^2.12.1
   sanitize_html: ^2.0.0
   stream_transform: ^2.0.0
   web: ">=0.5.1 <2.0.0"