Text on a curved path in GIMP

I am trying to make some text follow a curved path in GIMP. I want it to look similar to the text on the "Galaxy Quest" posters.

I have altered the text, so I can no longer use the 'text to path' function, and I can't alter the text AFTER I make it follow the path due to how I intend it to be altered.

Any thoughts/ideas/advice?