here is what i would do. if it is just for a logo that i need to create just one time.
can you create the brush for the rope? don't worry about the gradient just yet ... just get the shape right and then expand the brush and the off set the paths with a really small negative value. then make the offset path a light yellow and the original path orange... then do a blend shape between the two.. i don't have time to test this but you might need to regroup the paths.
also here is a link to some free illustrator brushes that should help you trouble shoot your problem in case having the gradient as part of the brush is critical.