Noob question about structs allocation

[IM via Digitalmars-d-learn]

I probably used to know the answer to this question, but it's 
been a long time since I last used D, and I don't remember. 
Suppose we have:

struct S {
  int num;
}
Would allocating an instance on the heap using:

S* s = new S;

use the GC, or do we have to call destroy() or delete on s 
ourselves?