Application not receives notification when app is not opened

Question

Apps like whatsap receives notification even when the app is not opened by the user. But in my case it is not happening. I am receiving notification on a class which inherits from GcmListenerService like below

public class GCMPushReceiverService extends GcmListenerService {


//This method will be called on every new message received
@Override
public void onMessageReceived(String from, Bundle data) {
    //Getting the message from the bundle
    String message = data.getString("message");


    Log.e("msg",message);

    //Displaying a notiffication with the message
     setNotification(message);
    }
}

I found there is something like GCMBroadcastReceiver or WakefulBroadcastReceiver that might help me. But i am confused about its implementation. If i can receive the message inside the onReceive() method of WakefulBroadcastReceiver, then why should i use GcmListenerService? Can anybody help me to implement it in the proper way?

My manifest file is as below

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.app">

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />

<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="com.example.localmarket.permission.C2D_MESSAGE" />
 <application
    android:name="com.example.app"
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"

   <activity android:name=".SplashActivity"
         android:theme="@style/Theme.Transparent"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
   <!--   GCM Receiver -->
    <receiver
        android:name="com.google.android.gms.gcm.GcmReceiver"
        android:exported="true"
        android:permission="com.google.android.c2dm.permission.SEND">
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />

            <!--<category android:name="com.gnirt69.gcmexample" />-->
        </intent-filter>
    </receiver>

    <!--             GCM Receiver Service -->
    <service
        android:name=".GCMPushReceiverService"
        android:exported="false">
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        </intent-filter>
    </service>



    <!--             GCM Registration Intent Service -->
    <service
        android:name=".GCMRegistrationIntentService"
        android:exported="false">
        <intent-filter>
            <action android:name="com.google.android.gms.iid.InstanceID" />
        </intent-filter>
    </service>


</application>
</manifest>

I think there should be some backend changes for fcm. Thus i cant migrate to fcm for now.