In fact GATrader it will monitor NYSE stocks if you give it a list of symbols. What it won't do, which it does for NAS stocks, is watch the whole market for stocks that meet your basic requirements (such as price between $10 and $60 with over 1m pro-rata volume) and automatically add them to the monitored list.
If you want programmable scans for NYSE stocks then probably First Alert is you best, and most expensive, option. If you just want a scanner to show you NYSE stocks with new movement or volume then you can try Tony Oz's scanner if you are using Real-Tick but this is not programmable.