Every Epiphone Goth LP i've seen has an arched/carved top. If you have a flat-topped Goth LP, i'd love to see photos of it. Flat-top Les Pauls are always have Junior/Special/Melody Maker in their names. I don't recall the Gibson or Epiphone Goth models falling into this category.
Maybe you're not using the term "veneer" correctly. Veneer is paper-thin. Take a piece of paper and try to glue it to conform to the arched top of a Les Paul, and you'll see that it only wants to bend one way. You can't get it to fit a compound-curved surface without cutting, folding, wrinkling, or severely deforming it in some way. Veneer will usually split and tear if you try and stress it too much. With a lot of steam and a vacuum table, you may be able to get a veneer to conform to a compound curve, but i don't think it's been very successfully done.
If you're talking about a carved top, that's another story. A top has significant thickness where you can carve contours into it to achieve an arched shape.