The Aussie is one of the main currencies to watch over Chinese GDP data
Bloomberg's economic market impact monitor is a handy guide to gauge the price action in various instruments over data points. You may have seen me run it for NFP.
I've thrown Chinese GDP and the aussie at it and here's the response for the last 4 releases over the first 5 minutes and first 60
Chinese GDP vs AUDUSD over 5 minutes
Over 60 minutes
It's not a definitive signal of any kind, and we have to take into account which way the market is leaning into the event. At the moment that lean isn't towards China coming out with 8% growth ;-)
Just for kicks, give me your guess for the pip size of the first 5 minute candle in AUDUSD following the release. I'll go 110 pips