File created by Generic Build Support (GBS), a build automation system that helps users develop software projects; contains data referenced by the GBS application that specifies different functions within the application, such as where files are exported or the general settings for system generation.

In the GBS application, there are a variety of GBS files located in different directories. One example of a GBS file is target.gbs. This file is used to associate file extensions with builders, such as compilers and linkers, for a specific target. It is located in the GBS_SYSGEN_PATH/target directory. Another example is steps.gbs, which is located in the GBS_SYS_PATH directory. This file defines the conditions and order for generating or auditing SubSystems. NOTE: Other examples of GBS files include audit.gbs, export.gbs, flags.gbs, incs.gbs, owners.gbs, sca.gbs, scope.gbs, switch.gbs, sys.gbs, system.gbs, and tool.gbs.

Data file created by CAD Printed Circuit Board (PCB) programs like Altium Designer; contains bottom-side solder mask data for boards with multiple layers; includes information about all the pads that need soldering to prevent solder bridging of traces and pads during production; similar to the .GTS file extension.

The name of the GBS file is derived from the name of your PCB. Therefore, if your PCB is called "MyProject," the file will be called MyProject.gbs. Gerber format files, like GBS, are stored in RS-274X format and act similar to .PDF files. They're an exported version of the PCB layout and are meant to be viewed and referenced but not edited. They're utilized by PCB manufacturing machines to designate electrical connections between components with pads and tracks. NOTE: The GBS format was originally developed by Gerber Systems but is now maintained by Ucamco.