The Collaborative International Dictionary of English v.0.48:

Gladful \Glad"ful\, a.
   Full of gladness; joyful; glad. [R.] -- Glad"ful*ness, n.
   [R.] --Spenser.
   [1913 Webster]

         It followed him with gladful glee.       --Spenser.
   [1913 Webster]