iOS Android and windows Push notification

iOS Android and windows Push notification

I have an application for for iOS, Android and Windows mobile.I want to
send notifications to the application. AFAIK as someone new to this, I
think that I need to send the notifications from my server to GCM server
for Android and APNS for iphone, I have no idea for windows.
I was hoping if I can send the notifications directly to the phone
(setting up a XMPP server , what the IM messenger usually use
(JABBER,EJABBERD etc.)) without going to APNS of GCM .
Is that possible, please guide me to the same .
Thanks.