It depends:
With crayons, paint, and markers, the answer is not really. Blue, Yellow, and Red are primary colors that cannot be created by mixing other colors. If the "gold" you're looking for is a yellow-gold, then you can't really make it with green. HOWEVER, I suppose that Red + Green would make brown, and if you added a touch of brown to yellow, you'd get a "gold" (Dark-yellow) type of color.
With LIGHT (as opposed to crayons, paint, etc) you would combine green and red to make yellow.
The final color really depends on the ratio of blue, green, and white. Together, if blue and green were mixed in equal quantities, then the result would be turquoise. Also, the color would vary on the shade/hue of the green or blue. If you mix a pale blue with a green or a dark blue with a green, the final color would differ. The addition of white will lighten the color. The more white, the lighter the final result. If you add white to the turquoise (50% blue+50%green), you would get a very light/faded turquoise (or blue/green). The great thing about mixing colors is that you could always add colors if you do not like the result. If you would like the color to have more of a blue hint to it, then add more blue. Though, I highly recommend adding the additional colors little by little, then mixing. This makes it easier to get the ideal color.
a little of dark green
Green.
Yellow
To make brown from green, add some red-orange color.
If you mix red and green paint you get brown.
yellow
red
brown
green
blue ..
yellow-green