Chevrolet Van Transmission Gear Selector Stuck

My Van 1979 G 30 8 Cl Is In Neutral And Not Move In Drive Or In Park I Bought In Auction But Tow Truck Drop My Home First Time I Saw This...

I Have A 1993 Chevy G20 Van. Auto Trans. When I Press The Brake And Try To Move It Out Of Park It Wont Move. Is There A Switch That Has Gone...