GBX (file format)
From GICLWiki
Extension: .gbx/.GBX
System: Gerber (RS-274-X)
Description: ASCII File with D Codes, aperture table included.
Extension: GBX
Program and/or Extension Function: Gerber File
Specific Notes: (printed circuit board layout)
Associated Links: ViewMaster Viewer, ViewMate Free Gerber File Viewer, GC-Prevue Free Gerber File Viewer
Identifying Characters: (None or Unknown)
Program ID: (None or Unknown)
General Notes: (None)