Defintely there. To decode,
1) find the tile size of the backrgound (duplicate the layer, set top to difference mode and see by how much you must shift it H and V to make it black again.
2) clipboard copy a rectangle selection of that size of the backrground (actual location or pixel alignment is unimportant)
3) bucket fill a layer with the clipboard pattern
4) put over the layer with the "hidden" text, set to difference mode and shift to minimize background
1) find the tile size of the backrgound (duplicate the layer, set top to difference mode and see by how much you must shift it H and V to make it black again.
2) clipboard copy a rectangle selection of that size of the backrground (actual location or pixel alignment is unimportant)
3) bucket fill a layer with the clipboard pattern
4) put over the layer with the "hidden" text, set to difference mode and shift to minimize background
In fact when you shift the image over itself to determine the tile size you can already see the initial image more clearly: