------------------------------------------------------------------------------------------ Gerber File Extension Report For: OptoTest.GBR 09.08.2026 13:57:58 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ Layer Extension Layer Description ------------------------------------------------------------------------------------------ .GTO Top Overlay .GTP Top Paste .GTS Top Solder .GTL Top Layer .GBL Bottom Layer .GBS Bottom Solder .GBP Bottom Paste .GBO Bottom Overlay .GKO Keep-Out Layer ------------------------------------------------------------------------------------------