Final answer:
The state capital located on the Gastineau Channel is Juneau, the capital of Alaska.
Step-by-step explanation:
The state capital located on the Gastineau Channel is Juneau, the capital of Alaska. Juneau is a city in the southeastern part of the state and it is known for its stunning natural surroundings, including mountains, glaciers, and the channel itself.
With its unique location, Juneau offers a variety of outdoor activities and is a popular tourist destination.