Original looks more like a sunset image merged with a gradient, however
Not exactly the same but this using only Gimp tools It does rely on a black background. Six screenshots, too many to display. Attached as two pdfs
Ref: 1-glitch.pdf
(1) Add some text in White over a gradient.
(2) Set the text layer to image size
Layer -> Layer to Image Size and (3) duplicate (as a spare - with visibility off)
(4) Apply the Wind filter
Filters -> Distorts > Wind Direction Left - Edge Both - Threshold maximum - Strength up-to-you
(5) Apply the Wind filter again, this time with Direction Right.
Ref 2-glitch.pdf
(6) Add a black background to the text. If you still have the BG colour set to black, it is
Layer -> Transparency -> Remove Alpha Channel' otherwise add a layer and merge down.
(7) Put the text layer into multiply mode.
(8) If you want it a little bolder, enable the spare text layer and set the mode to Soft Light.
Edit: This plugin might be worth experimenting with
https://www.gimplearn.net/viewtopic.php/...f=3&t=1455