Are you taking any thiazide diuretics for you blood pressure? If your not certain, just Google "thiazide diuretics". This group of drugs are well known for causing gout and can also aggrevate it in existing gout patients. Many patients are completely unable to take thiazides because of this reason. Can you provide us with a list of the tablets you're taking?
Salt reduction will result in a measurable effect on your blood pressure, but don't exclude it completely from your diet. It is correct to say that processed food invariably contains a lot of salt, but I have met people who deliberately refrain from eating such food and show symptoms of salt deficiency, so be careful.
However, you may have some medical conditions other than high blood pressure and gout which make salt reduction in your case, important.