Yes there is such a thing!as pumpkin marmalade!
This is the recipe I like . . it is easy to make and is a recipe from   Jo_jo_ba  of Oshawa, CA

      16 cups diced  pumpkin ( 5 lbs)
          3 lemons, peeled
          1 large orange, peeled
          2” piece fresh ginger, peeled      and grated
            8 cups white sugar.         
                                         1 cup water
                             ¼ cup apple juice                 
How to make it

Place pumpkin in a large, heavy-bottomed pot.
Slice citrus very thin, removing seeds.
Add with sugar to pumpkin. Stir and leave overnight.
Place over medium heat and add water.
Simmer uncovered 2 ½ hours or until thick.
Stir in apple juice.
Pour into hot, sterilized jars and seal.