gerbv project added with pretty colors and layers arranged, usage:

$ gerbv -p ulx3s.gvp

plot/ulx3s.gvp

@@ -0,0 +1,15 @@
+(gerbv-file-version! "2.0A")
+(define-layer! 11 (cons 'filename "ulx3s/ulx3s.gtl")(cons 'visible #t)(cons 'color #(60988 46493 16331)))
+(define-layer! 10 (cons 'filename "ulx3s/ulx3s.gts")(cons 'inverted #t)(cons 'visible #t)(cons 'color #(42496 1843 0)))
+(define-layer! 9 (cons 'filename "ulx3s/ulx3s.gtp")(cons 'visible #t)(cons 'color #(36996 36996 36996)))
+(define-layer! 8 (cons 'filename "ulx3s/ulx3s.gto")(cons 'visible #t)(cons 'color #(65535 65535 65535)))
+(define-layer! 7 (cons 'filename "ulx3s/ulx3s.gl3")(cons 'visible #f)(cons 'color #(64624 47562 61256)))
+(define-layer! 6 (cons 'filename "ulx3s/ulx3s.gl2")(cons 'visible #f)(cons 'color #(65535 62684 34642)))
+(define-layer! 5 (cons 'filename "ulx3s/ulx3s.gbl")(cons 'visible #f)(cons 'color #(65535 48932 22002)))
+(define-layer! 4 (cons 'filename "ulx3s/ulx3s.gbs")(cons 'inverted #t)(cons 'visible #f)(cons 'color #(0 25683 599)))
+(define-layer! 3 (cons 'filename "ulx3s/ulx3s.gbp")(cons 'visible #f)(cons 'color #(39361 39361 39361)))
+(define-layer! 2 (cons 'filename "ulx3s/ulx3s.gbo")(cons 'visible #f)(cons 'color #(65535 65535 65535)))
+(define-layer! 1 (cons 'filename "ulx3s/ulx3s.drl")(cons 'visible #t)(cons 'color #(62468 37930 36113))(cons 'attribs (list (list 'autodetect 'Boolean 1) (list 'zero_supression 'Enum 2) (list 'units 'Enum 0) (list 'digits 'Integer 4))))
+(define-layer! 0 (cons 'filename "ulx3s/ulx3s.gml")(cons 'visible #t)(cons 'color #(65535 62024 1579)))
+(define-layer! -1 (cons 'filename "/home/guest/src/fpga/circuits/ulx3s/plot")(cons 'visible #f)(cons 'color #(0 0 0)))
+(set-render-type! 0)