Text question

Here is a text question, and I have looked in memories to see if there is a solution, but I can't find exactly what I am looking for.

I wanna know how you can give text a black border like in this icon by username101



I know how to make the text transparent, but I still have not figured out how to get the black border around the text. Is there an easy solution to my problem? I am useing GIMP 2.2

Thanks in advance. I am sure that it is obvious, but I can't find how to do it!