I am not sure how to respond to your question. Pleas be a little bit clearer.
However, if you are asking how to update a database running on FM Go with data from FMP on a laptop/desktop or hosted (Filemaker Server), you will need to sync or transfer the data from the solution from the hosted/laptop/desktop database. I suggest you read this guide to assist you. FileMaker Go Development Guide
I also suggest you look under the "Resources" section where you will have access to several resources.
Your best bet is to have your database file hosted on Filemaker Server or running on a desktop/laptop on your network. But to enter data from your iPad you need to be connected.
Try to refine your request so we can all assist you.
No, FMGo does not update automatically.