Old text

[Ofnuts]

Not too hard to do manually

• Create you text in gray
  
• Get a selection on the text
  
• Add a new layer, fill a selection with a Shaped (angular) gradient, white at center, black on edges if you want relief, and vice-versa if you want carved.
  
• For texture Filters > Noise > HSV noise and add Value noise
  
• Remove selection, select text layer (or a copy)
  
• Filters > Map > Bump map and use the gradient-in-selection layer as the bump map