diff --git a/Maio/CHANGELOG.md b/Maio/CHANGELOG.md
new file mode 100644
index 0000000..c381d1c
--- /dev/null
+++ b/Maio/CHANGELOG.md
@@ -0,0 +1,116 @@
+## maio Unity Mediation Plugin Changelog
+
+#### [Version 2.0.3](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-2.0.3.zip)
+- Supports [maio Android adapter version 1.1.16.3](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11163).
+- Supports [maio iOS adapter version 2.1.5.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-2150).
+- Built and tested with the Google Mobile Ads Unity Plugin version 9.1.0.
+
+#### [Version 2.0.2](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-2.0.2.zip)
+- Supports [maio Android adapter version 1.1.16.3](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11163).
+- Supports [maio iOS adapter version 2.1.4.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-2140).
+- Built and tested with the Google Mobile Ads Unity Plugin version 9.0.0.
+
+#### [Version 2.0.1](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-2.0.1.zip)
+- Supports [maio Android adapter version 1.1.16.2](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11162).
+- Supports [maio iOS adapter version 2.1.3.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-2130).
+- Built and tested with the Google Mobile Ads Unity Plugin version 9.0.0.
+
+#### [Version 2.0.0](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-2.0.0.zip)
+- Supports [maio Android adapter version 1.1.16.2](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11162).
+- Supports [maio iOS adapter version 2.1.1.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-2110).
+- Built and tested with the Google Mobile Ads Unity Plugin version 8.6.0.
+
+#### [Version 1.4.3](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.4.3.zip)
+- Moved adapter content to `GoogleMobileAds/Mediation/Maio/`.
+- Supports [maio Android adapter version 1.1.16.2](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11162).
+- Supports [maio iOS adapter version 1.6.3.1](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1631).
+- Built and tested with the Google Mobile Ads Unity Plugin version 8.1.0.
+
+#### [Version 1.4.2](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.4.2.zip)
+- Supports [maio Android adapter version 1.1.16.1](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11161).
+- Supports [maio iOS adapter version 1.6.3.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1630).
+- Built and tested with the Google Mobile Ads Unity Plugin version 7.4.0.
+
+#### [Version 1.4.1](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.4.1.zip)
+- Supports [maio Android adapter version 1.1.16.1](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11161).
+- Supports [maio iOS adapter version 1.6.2.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1620).
+- Built and tested with the Google Mobile Ads Unity Plugin version 7.1.0.
+
+#### [Version 1.4.0](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.4.0.zip)
+- Supports [maio Android adapter version 1.1.16.0](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11160).
+- Supports [maio iOS adapter version 1.6.0.1](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1601).
+- Built and tested with the Google Mobile Ads Unity Plugin version 7.0.0.
+
+#### [Version 1.3.6](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.3.6.zip)
+- Supports [maio Android adapter version 1.1.16.0](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11160).
+- Supports [maio iOS adapter version 1.5.8.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1580).
+
+#### [Version 1.3.5](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.3.5.zip)
+- Supports [maio Android adapter version 1.1.15.0](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11150).
+- Supports [maio iOS adapter version 1.5.6.1](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1561).
+
+#### [Version 1.3.4](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.3.4.zip)
+- Supports [maio Android adapter version 1.1.11.1](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11111).
+- Supports [maio iOS adapter version 1.5.4.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1540).
+
+#### [Version 1.3.3](https://dl.google.com/googleadmobadssdk/mediation/unity/maio/MaioUnityAdapter-1.3.3.zip)
+- Supports [maio Android adapter version 1.1.11.1](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11111).
+- Supports [maio iOS adapter version 1.5.3.1](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1531).
+
+#### Version 1.3.2
+- Supports [maio Android adapter version 1.1.11.0](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11110).
+- Supports [maio iOS adapter version 1.5.2.1](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1521).
+
+#### Version 1.3.1
+- Supports [maio Android adapter version 1.1.10.0](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11100).
+- Supports [maio iOS adapter version 1.5.1.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1510).
+
+#### Version 1.3.0
+- Supports [maio Android adapter version 1.1.10.0](https://github.com/googleads/googleads-mobile-android-mediation/blob/main/ThirdPartyAdapters/maio/CHANGELOG.md#version-11100).
+- Supports [maio iOS adapter version 1.5.0.0](https://github.com/googleads/googleads-mobile-ios-mediation/blob/main/adapters/Maio/CHANGELOG.md#version-1500).
+
+#### Version 1.2.3
+- Updated the plugin to support the new Rewarded API.
+- Supports maio Android adapter version 1.1.7.0.
+- Supports maio iOS adapter version 1.4.6.0.
+
+#### Version 1.2.2
+- Supports maio Android adapter version 1.1.6.0.
+- Supports maio iOS adapter version 1.4.2.0.
+
+#### Version 1.2.1
+- Supports maio Android adapter version 1.1.6.0.
+- Supports maio iOS adapter version 1.4.1.0.
+
+#### Version 1.2.0
+- Supports maio Android adapter version 1.1.4.1.
+- Supports maio iOS adapter version 1.4.0.0.
+
+#### Version 1.1.3
+- Supports maio Android adapter version 1.1.3.1.
+- Supports maio iOS adapter version 1.3.2.0.
+
+#### Version 1.1.2
+- Supports maio Android adapter version 1.1.3.0.
+- Supports maio iOS adapter version 1.3.2.0.
+
+#### Version 1.1.1
+- Supports maio Android adapter version 1.1.1.0.
+- Supports maio iOS adapter version 1.3.1.1.
+
+#### Version 1.1.0
+- Supports maio Android adapter version 1.1.0.0.
+- Supports maio iOS adapter version 1.3.0.0.
+
+#### Version 1.0.2
+- Supports maio Android SDK version 1.0.8.
+- Supports maio iOS SDK version 1.2.19.
+
+#### Version 1.0.1
+- Supports maio Android SDK version 1.0.7.
+- Supports maio iOS SDK version 1.2.19.
+
+#### Version 1.0.0
+- First release!
+- Supports maio Android SDK version 1.0.6.
+- Supports maio iOS SDK version 1.2.18.
diff --git a/Maio/CHANGELOG.md.meta b/Maio/CHANGELOG.md.meta
new file mode 100644
index 0000000..0fa821e
--- /dev/null
+++ b/Maio/CHANGELOG.md.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: d38de2003bcb740d88f21d09e122c94d
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Maio/LICENSE b/Maio/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/Maio/LICENSE
@@ -0,0 +1,202 @@
+
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diff --git a/Maio/LICENSE.meta b/Maio/LICENSE.meta
new file mode 100644
index 0000000..695d3c1
--- /dev/null
+++ b/Maio/LICENSE.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 61ff370ee4bcf44ddb79b79d674547f4
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Maio/README.md b/Maio/README.md
new file mode 100644
index 0000000..7fad3d7
--- /dev/null
+++ b/Maio/README.md
@@ -0,0 +1,8 @@
+# maio Adapter plugin for Google Mobile Ads SDK for Unity 3D
+
+This is a plugin to be used in conjunction with the Google Mobile Ads SDK in
+Google Play services. For requirements, instructions, and other info, see the
+[maio Adapter Integration Guide](https://developers.google.com/admob/unity/mediation/maio).
+
+See the [changelog](https://developers.google.com/admob/unity/mediation/maio#maio-unity-mediation-plugin-changelog)
+to view the version history.
diff --git a/Maio/README.md.meta b/Maio/README.md.meta
new file mode 100644
index 0000000..28e772a
--- /dev/null
+++ b/Maio/README.md.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 403486241c74d4701ad93e1160ba1672
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Maio/build.gradle b/Maio/build.gradle
new file mode 100644
index 0000000..86524e8
--- /dev/null
+++ b/Maio/build.gradle
@@ -0,0 +1,99 @@
+/*
+*   Gradle file to build a Unity package to add maio mediation support to the Google Mobile Ads Unity plugin.
+*   Usage: ./gradlew exportPackage
+*/
+defaultTasks 'exportPackage'
+
+// Project level variables.
+project.ext {
+    unity_exe = System.getProperty("UNITY_EXE")
+    if (unity_exe == null || unity_exe.isEmpty()) {
+        unity_exe = System.getenv("UNITY_EXE")
+    }
+    if (unity_exe == null || unity_exe.isEmpty()) {
+        unity_exe = '/Applications/Unity/Unity.app/Contents/MacOS/Unity'
+    }
+
+    if (!file(unity_exe).exists()) {
+        throw new GradleException('Unable to locate installation of Unity. Please create a ' +
+                'UNITY_EXE environment variable and point it to your Unity installation.')
+    }
+
+    versionString = '2.0.3'
+    adapterName = 'Maio'
+    pluginName = "GoogleMobileAds${adapterName}Mediation"
+    pluginFileName = "${pluginName}.unitypackage"
+    zipName = "${adapterName}UnityAdapter-${versionString}"
+    zipFileName = "${zipName}.zip"
+    pluginSource = file('source/plugin').absolutePath
+    pluginBuildDir = file('temp/plugin-build-dir').absolutePath
+    buildPath = file('temp').absolutePath
+    exportPath = file(pluginFileName).absolutePath
+}
+
+// Build unity package using through command line interface.
+// Create new unity project with files in temporary build directory and export files to a unity package.
+// Command line usage and arguments documented at http://docs.unity3d.com/Manual/CommandLineArguments.html.
+task exportPackage(type: Exec) {
+    description = "Creates and exports the Plugin unity package"
+    executable "${unity_exe}"
+    args "-g.building",
+            "-batchmode",
+            "-projectPath", "${pluginBuildDir}",
+            "-logFile", "temp/unity.log",
+            "-exportPackage",
+            "Assets/GoogleMobileAds",
+            "${exportPath}",
+            "-quit"
+
+    ignoreExitValue true
+
+    doLast {
+        if (executionResult.get().exitValue != 0) {
+            copy {
+                from "temp/"
+                into "./"
+                include "unity.log"
+            }
+        }
+    }
+}
+
+task createTempBuildFolder(type: Copy) {
+    from { "${pluginSource}" }
+    into { "${pluginBuildDir}" }
+}
+
+task clearTempBuildFolder(type: Delete) {
+    delete { "${buildPath}" }
+}
+
+exportPackage.dependsOn(createTempBuildFolder)
+exportPackage.finalizedBy(clearTempBuildFolder)
+
+/**
+ * Delete task to delete any previously generated .zip files by makeZip task.
+ * makeZip depends on this task.
+ */
+task clearZip(type: Delete) {
+    // Targets to be deleted.
+    delete(zipFileName)
+}
+
+/**
+ * Zip task to make a zip archive. This task depends on exportPackage and clearZip tasks.
+ */
+task makeZip(type: Zip) {
+    // Targets to be added to the zip archive.
+    from('./' + pluginFileName, './README.md')
+    from('./' + pluginFileName, './LICENSE')
+    // Root directory name for the zip archive.
+    into(zipName)
+    // Name of the zip archive.
+    archiveFileName = zipFileName
+    // Destination directory in which the archive needs to be saved.
+    destinationDirectory = file('.')
+}
+
+makeZip.dependsOn([clearZip, exportPackage])
+makeZip.mustRunAfter([clearZip, exportPackage])
diff --git a/Maio/build.gradle.meta b/Maio/build.gradle.meta
new file mode 100644
index 0000000..24f1869
--- /dev/null
+++ b/Maio/build.gradle.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: a3f298fe84dbc4f059d205d3dbbfa89c
+DefaultImporter:
+  externalObjects: {}
+  userData: 
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diff --git a/Maio/package.json b/Maio/package.json
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index 0000000..29e89f8
--- /dev/null
+++ b/Maio/package.json
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+{
+  "name": "com.google.ads.mobile.mediation.maio",
+  "version": "2.0.3",
+  "displayName": "Google Mobile Ads Maio Mediation",
+  "keywords": [
+    "Google",
+    "Mobile",
+    "Ads",
+    "vh-name:GoogleMobileAdsMediationMaio",
+    "vh-name:Google Mobile Ads Maio Mediation"
+  ],
+  "author": {
+    "name": "Google LLC",
+    "url": "https://github.com/googleads/googleads-mobile-unity"
+  },
+  "description": "The Google Mobile Ads mediation plugin for Maio package allows you to load and display ads from Maio using mediation, covering waterfall integrations.",
+  "unity": "2019.4",
+  "dependencies": {
+    "com.google.ads.mobile": "9.0.0"
+  }
+}
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diff --git a/Maio/source/plugin/Assets/GoogleMobileAds/Mediation/Maio/Editor/MaioMediationDependencies.xml b/Maio/source/plugin/Assets/GoogleMobileAds/Mediation/Maio/Editor/MaioMediationDependencies.xml
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index 0000000..d3df77d
--- /dev/null
+++ b/Maio/source/plugin/Assets/GoogleMobileAds/Mediation/Maio/Editor/MaioMediationDependencies.xml
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+<!--
+    Copyright 2017 Google LLC
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        https://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+
+<dependencies>
+  <androidPackages>
+    <androidPackage spec="com.google.ads.mediation:maio:1.1.16.3">
+      <repositories>
+        <repository>https://repo.maven.apache.org/maven2/</repository>
+        <repository>https://dl.google.com/dl/android/maven2/</repository>
+        <repository>https://imobile-maio.github.io/maven/</repository>
+      </repositories>
+    </androidPackage>
+  </androidPackages>
+
+  <iosPods>
+    <iosPod name="GoogleMobileAdsMediationMaio" version="2.1.5.0"/>
+  </iosPods>
+</dependencies>
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