What is .GPJ file extension?
Project file created by Grapher, a program used for generating 2D and 3D graphs; stores both the visual graph and the source data used to generate the graph; differs from a Grapher .GRF file, which only stores the visual graph, not the source data; used for generating visuals for technical publications and presentations.
GPJ files can be used for saving various kinds of graphs, including bar, line, and scatter graphs. They can also be used for advanced types such as ternary, box-whisker, and hi-low-close plots.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.