What is the distance, on a coordinate plane, between the points $G(4,0)$ and $D(-8,0)$ ?

Step 1 ：Given points G(4,0) and D(-8,0)

Step 2 ：Since both points have the same y-coordinate (0), we can simply find the difference between their x-coordinates to find the distance

Step 3 ：\(distance = |x_G - x_D| = |4 - (-8)| = |4 + 8| = |12|\)

Step 4 ：\(\boxed{12}\)