Yes, you can connect your iPad / FM Go to a hosted database. The above information gives you steps on how to do this.
A couple of things to remember:
1. You have to be able to connect to the internet.
2. On the server, you have to purchase "concurrent licenses". This allows a connection to the hosted database. Every server license, I believe, comes with one concurrent connection. You can purchase more through Server in packs of 5.
3. FM Go is free, by the way.
If you are concerned about FileMaker Go giving intruders access to your FM 14.0.4 database, I must assume that users already have passwords to connect to the server-host.
For my clients who use FileMaker Go, getting 'real-time' access to information in their database for the benefit of their clients and employees when on the road is the main point in using FileMaker Go.