Works alright for what it is, but there's a couple of things that could be better. Firstly, Dust Storm Warning doesn't work. Choosing it and returning to the EAS screen shows that the text isn't changed at all.
A second, small gripe is that some of the most common alert types are included, but that's it. There's no options for some more obscure events such as Emergency Action Notifications or any test cards. If there was a text input option, it's be perfect. I don't know it that's possible in GDevelop, but it's a nice idea.