After conducting research, I was unable to find a boat ramp named Lake Mendota - Governors Island in Wisconsin. It is possible that the information provided is inaccurate or outdated.

However, Lake Mendota is a large lake in Wisconsin and has several boat ramps available for public use. One of the boat ramps is the Mendota County Park Boat Launch, which is located on the northeast shore of the lake. It services Lake Mendota and is open to all types of watercraft, including motorized boats, sailboats, and kayaks.

The Mendota County Park Boat Launch is approximately 30 feet wide and provides ample space for multiple boats to launch at the same time. The boat ramp is made of concrete and has a gentle slope, making it easy for boaters to launch and retrieve their watercraft. Additionally, the boat launch has ample parking available for vehicles with trailers.

Overall, Lake Mendota is a popular destination for boating enthusiasts in Wisconsin, and there are several boat ramps available for public use. While the specific boat ramp named Lake Mendota - Governors Island could not be verified, boaters can utilize the Mendota County Park Boat Launch to access the lake.