Introduce yourself to the benefits of Advanced Private Practice - GI Alliance of Northwest Arkansas. powered by. GI Alliance. As a member of the GI Alliance (GIA), GI AllianceĀ of Northwest ArkansasĀ is supported by the nations largest and most reputable team of gastroenterology experts. This partnership between GI practices allows physicians to provide the highest-quality personalized care to their patients while receiving the organizational suppo...