One feels highly restricted when one goes through the list of avoidable food for gout sufferers. And, particularly so, if one is suffering simultaneously with diabetes as well (as I myself am). It is universally recommended that one has to substantially reduce the intake of purine-containing foods. However, mere diet control won’t be a remedial course during an recent episode of gout attack, and proper drug regimen is very much required, at least initially, to counter the agony of an attack, and the somewhat persistent inflammation in the affected joint(s). It must be pointed out though that the uricouric drugs have their own side-effects too, especially if used on long-term basis. Therefore, once the initial attack symptoms subside significantly, dietary discretion plays perhaps the biggest role in keep serum uric acid levels in check.

A reasonably good gout diet will certainly help with the following issues over a period of time :

Maintenance of healthy body weight
Set and stick to good eating habits
Minimizing intake of purine-rich food items.

Foods to be be minimized or avoided significantly :

Beer and other grain-based liquors (malt produce etc)
Red meat and sea food in general
Organ meats, such as liver, kidneys, thymus or etc
High-fructose products like soda and fruit juices, processed cereals, ice cream, candies etc

Preferred foods :
Low-fat and non-dairy fat products
Fresh fruits and vegetables
Limited consumption of nuts, nut-based butters
Fat and oil 
Potatoes, rice, bread, and pasta (in rigidly-controlled amounts if you’re a diabetic too)
Eggs
White meat in moderation – fish & chicken
Low-purine vegetables – going easy of mineral-rich leafy veggies and the members of the nightshade family

Dos :
Keep well hydrated. Be very careful if you have been recommended ‘diuretics’ (water pills) to manage your blood pressure