Records in Grady county does not say who owns minerals. You have to go to the court records to find it. When you get there you have to look up that section, township and range and each deed from the beginning and follow each transaction to each person that has bought acres in that section, township and range, to see if the minerals were passed on to the next person that bought land/acres. You can also see who is leasing or selling in that Section, which tells you who owns the minerals.