No that could be abused. Ordering the unit to stop will order it to attack just as fast. Which equals players getting like 10 gold per sec.
There is a problem with some auto cast spells, some of them don't register in casting events.
What Island Defense did is they had an event that the lil stone of gold took damage, and they made sure that the damaging unit was a... whatever you call them. And every time it is damaged by the "golder" they get a certain amount of gold. You must make sure though that the stone is maigc immune and can't be targeted by like flame strike. Or else you will end up having some player get a super amount of gold really quickly.