configuring GCM & APNS on server side to send notification through API

I have an API, which send push notification, which has set up in my hosting server. This api, push notification, according to device type [ios, android], presently i have set up gcm to send push notification to android devices. i need to add TTL [time to live] & css receipts for notification. So if the device is ios, i need to push the notification through APNS, and the same need to be configured in my server. I would looks for an expert who has very good experience in gcm and apns configuring. i can provide, my present api with code, need to fix the bugs and configure apns to handle ios devices.