Hi there! GNU Data Language, or GDL for short, is a program that helps people make and analyze graphs and charts with data. It's like a really fancy coloring book, where you put in some numbers and it makes pretty pictures for you!
So, let's say you have some data about how many cookies people eat in a day. You could write those numbers down on a piece of paper and then use GDL to turn that paper into a graph that shows you which person eats the most cookies. The graph might have lines or bars or circles, depending on what you want it to look like.
GDL is special because it's free to use and can do lots of different things. You can make graphs for school projects, scientific research, or just for fun! Plus, since it's free, lots of people can use it and share their graphs with each other.
But don't worry if this all sounds a bit confusing - GDL is a little tricky to learn, but there are lots of tutorials and guides out there to help you figure it out. And who knows, maybe one day you'll be a pro at making graphs!