How do i find the public record of a will?

i am trying to locate a copy or a public record of my greatgrandfathers will? is this possible? will it have the info in it such as benificiaries etc?? so 10 years ago my greatgrandfather passed away, and my father a greedy drunk in my opinion tells me i was not in the will. in light of recent event and conversations i beleive he is lying. or i just refuse to believe that the only greatgrandchild/grandchild was left out of the will. iam my fathers only child. so i cannot fathom that my greatgrandfather would not include me. i believe my grandfather is/was the one in charge of it if not him then my greatgrampas bro was however the brother has been deceased for sum time and i cant talk to grandfather because of my father plus i dont want him getting wind of me snooping around. im sure if anything was left hes already squandered it away, but ill take him to court for fraud or whatever it would be considered. im not a greedy person but my dad is just squandering away my grandpas money hes not taking care of the home and i love that home i spent EVERY summer and xmas there for as long as i can remeber it has sentimental value to me and would be nice if i could share it with my daughter. anyways i need some help desperately i read that in the usa it is required by law that all wills be filed with the city and state not trusts but the will is the trusts the people who would be named?? how do i found out anything. i know that if i ask my father right out hell deny me being in it, and if i tell him i wnat to find out he may try and cover it up. this just bothers me more so emotionally i refuse to believe my greatgrandfather didnt love me enough to put me in his will, this just boggles my mind i am the only greatgrandchild. was anyways. but i just cannot except this without proof. please someone help, lost and confused.