Do not do that. If you believe there are naked shorts attacking don't put in GTC sell orders. They can just print up shares to sell, they dont need to borrow yours, right?
$2 is too low. $20 is probably too low. If you really sleep better with a $200 GTC then go for it...
It would suck for any long to get sold out at $2 because they believed a GTC stops shorting.