Do general practitioners know about mccradle's disease?

Some do. Is there a question of trust? Not every physician knows everythiing about anything! a generalist is just that, a generalist. Each generalist has areas of expertise and general knowledge but may not know about specific this such as mcardles's disease. This may be best evaluated, treated and followed by a neurologist. However, trust your pcp and have a good working relationshi;p with him/her!
McArdle's. Most pediatricians miss mcardle's glycogen storage disease on routine screening, and this is understandable. Junior goes through years of being called a slacker in gym class until some alert consultant makes the call.
McCardle's? If you are referring to the glycogen storage disease known as mccardle's, most gps should be familiar. If not, they can certainly look it up.