There's alot more info needed to answer your question. The way the deed was structured with your g'parents is important. That determines who owns it after the first one passed away. Secondly, did the 'last person' holding the deed have a will? It can go on and on. I have been dealing with real estate for over 22 years. I can put you in touch with someone that can help you resolve these issues.
The first big question to ask yourself is, is the property worth enough (to you - not on the market) to resolve all of this? If it has sentimental value to you or is a valuable parcel, then it would be worth it. Please give me a call at your convenience and we can discuss the situation. I can be reached at 601.297.4400.