GIMP Gradient
Name: My Grad
2
0.000000 0.250000 0.500000 1.000000 0.000000 0.000000 1.000000 0.000000 1.000000 0.000000 1.000000 3 0 0 0
0.500000 0.750000 1.000000 0.000000 1.000000 0.000000 1.000000 0.000000 0.000000 1.000000 1.000000 4 0 0 0

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First line says it is a gimp gradient file.

Second line gives your Gradient a suitable name.

Third line tells the number of segments in the gradient.

Each line following defines the property of each segment in following order.

[position of left stoppoint] [pos. of middle point] [pos. of right stoppoint] [R for left stoppoint] [G for left stoppoint] [B for left stoppoint] [A for left stoppoint] [R for right stoppoint] [G for right stoppoint] [B for right stoppoint] [A for right stoppoint] [Blending function constant] [Blending function  constant] [Blending function constant] [Blending function constant]