See your doctor and/or a dietician - and not a "nutritionist" (who are generally quacks, or at least not nearly as qualified). If you're lucky you can identify what behaviors may contribute to having the symptoms of gout... as suggested, "beer and BBQ" is a good place to start.
With the help of my GP, I was able to narrow down my "symptoms of gout" (in my 30s) to binging on "Cool Ranch Doritos" and some processed meats, chorizo mostly. I'm sure everyone is different.
A nice side-effect of a thorough and objective analysis of your dietary intake might be identifying other potential risk areas. In my case, it was quickly evident my sugar intake was ridiculous (added to coffee, and Pepsi). Cycling and other sporting activities masked any outward signs, as I'm not overweight - but your body still has to process what you put into it.
Good luck!