Convert gd2 to pdf Online: gd22pdf

You can use Tom's Editor to easily convert images from
GD Library 2 Image .GD2 to Portable Document Format .PDF.
Tom's Editor is a free, online image manipulation and converter program.

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GD2

GD Library 2 Image is an image format with extension GD2.

PDF

Adobe PDF format is the most popular document format. Overcomplicated. Offers compression.