The Collaborative International Dictionary of English v.0.48:

Gradely \Grade"ly\, a. [Cf. AS. grad grade, step, order, fr. L.
   gradus. See Grade.]
   Decent; orderly. [Prov. Eng.] --Halliwell. -- adv. Decently;
   in order. [Prov. Eng.]
   [1913 Webster]