GPB is an extension file format of the Gerber group used in a PCB printed circuit board industry. GTP contains Gerber Bottom Pad Master data required to draw patterns on circuit boards.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple GPB files as once.
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