Like any surgical procedure, a gastrojejunostomy could result in infection or another complication. A gastrojejunostomy connects the stomach to the jejunum, bypassing the duodenum, the beginning of the intestine at the bottom of this image.
One more thing: Don't make your turtle's water temperature too warm. For most adult aquatic turtle species, 78 F. (25.5 C.) is the highest you want unless you're treating them for an illness and a veterinarian has told you to raise the temperature. Otherwise, too-warm water can encourage bacteria growth in the tank. It also discourages turtles from basking sometimes.
How to Feed Your Turtles. Aquatic turtles need to eat in the water to be able to swallow. If you put food on land, they might eat it there but most likely will haul it into the water. Thus, you should be present as your turtle eats and remove any uneaten food after about five minutes.