The process referred to in the question is known as deposition. In chemistry, deposition is the phase transition in which gas transforms directly into a solid without passing through the liquid state. This process is the reverse of sublimation and is a common method for material formation in certain environments.

The correct choice reflecting the state conversion during deposition is Gaseous to solid state.

In summary, during deposition, a substance transitions from its gaseous state directly to a solid state.