Gelatin question

Extract brewed a brown ale 2 weeks in primary, then cold crashed to corny for 2 weeks and carbonated. Good flavor but very cloudy. I poured off several pints but still very cloudy. I am wondering if I could add gelatin even though it is carbonated. Most people seem to add the gelatin to the keg and then rack from the fermentor straight into the keg. If the consensus ends up being that I use the gelatin, my plan was to use the 1/2 pack of Knox gelatin to 1/2 cup of water and add directly into the keg, shake to mix and let settle for 2-3 days before trying another sample. Thanks in advance for everyone’s ideas.

This should work fine. You will still pull some pints of cloudy beer. But it should clear quickly when the settled, fined material around the dip tube clears. As long as you don’t move the keg after this, the rest should be clear.