^NAME^LAYER^
|pcbname.GTL|Top Copper|
|pcbname.GTS|Top Soldermask|
|pcbname.GTO|Top Silkscreen|
|pcbname.GBL|Bottom copper|
|pcbname.GBS|Bottom Soldermask|
|pcbname.GBO|Bottom Silkscreen|
|pcbname.TXT|Drills|
|pcbname.GKO|Board Outline|