Locate near with other tourist spot.
I think it is a so small forest that you can walk around 15-20 mins and you will already finished seeing everything. It's like a miniature of a forest and an ancient house in it.
If you are looking for something to see INSIDE the gyerim forest area, sorry you will be extremely disappointed, I was there in early March and there's nothing at all besides a tombstone and a pavilion, it's just an area with the story of a kid found inside the area and later he became one of the kings of the...
I came to see this as I was here in autumn and wanted to see the leaves changing colour. Its a small "forest" which you can walk around and see some nature, but its not something you should come out of your way for, luckily there were other things in the area that you can also see.