Android : Testing a live GCM push notification with only one selected device

I developed an app, and its now live on the google play store, the app has a GCM push notification, but i made an adjustment in the notification service and now I want to test the url that triggers the notification, but the issue is how do I test the notification such that it sends the notification only to my device. what triggers the notification is a URL that is called.Please i need a detailed explanation on how to do this. Thank you