The GTL extension is part of the Gerber group of formats, used as a standard in the fabrication of printed circuit boards (PCB). Gerber files contain 2D vector images that describe different data connected to PCB production, such as copper layers, solder masks, drilling or milling info. GTL files are created using Protel, a popular software for PCB layout design, and they describe the top copper layer.
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 GTL files as once.
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