How can I drink water without having gas?!
Answers: man are you serious
My guess of why you have gas while drinking water is that water promotes digestion, therefore speeding up the rate that you pass gas. Unless you want to dehydrate yourself I do suggest you drink water regardless of how much gas you pass.
It's probably not the water alone. It's going to have a lot moe to do with what you are eating. Take a look at the foods you eat and see if you are digesting too many antioxidant foods, or acidic foods at one time.
If you are meaning the belching kind of gas it could have to do with how you are drinking. Try drinking through a straw instead of a bottle. You could be swallowing air.
Sure cold water no gas to heat it up.