General practitioners are attorneys that are capable of covering a wide variety of legal issues.  It means that the attorney does not limit their law practice or specialty to one particular area of law.
They don’t specialize. They practice in many different areas of the law. 
They can deal with contracts, real estate transactions, general business matters, the writing of wills and other general matters. As well as some other common practice areas including family law, bankruptcy, trusts and estates, landlord and tenant issues, as well as some criminal law issues.