Based on the available information, the Grayson County boat ramp in Texas is a public boat ramp that is open year-round. It is located at latitude 33.87565994 and longitude -96.63784027. The boat ramp provides access to Lake Texoma, which is a popular recreational area for boating, fishing, and swimming.

The Grayson County boat ramp is reportedly a concrete ramp that is 8 feet wide. It is suitable for launching both motorized and non-motorized watercraft, including fishing boats, jet skis, kayaks, canoes, and sailboats. The ramp is also equipped with a courtesy dock to facilitate the launching and retrieval of boats.

It is important to note that the information provided may be subject to change, and it is always advisable to consult the latest available resources to verify the accuracy of any information regarding the Grayson County boat ramp or any other boating facilities. Additionally, it is always important to follow all local rules and regulations when using any boat ramp or water body to ensure safety and compliance with all laws and regulations.