Just check for bugs on the underside of the leaves and if none are found, you are fine to bring it indoors.
But, if it is doing so well outdoors, why bring it inside?
You will get much, much better quality trichomes on your flowers from sunlight than any artificial light.
In fact, the reason it is doing so well, is probably because it is outdoors!
And believe me, once you grow outdoors, everything else is a second rate compromise!
If this plant is another "The White OG" like in your indoor grow, you will be able to compare them directly and find out yourself as to why plants grown in sunlight are superior to any plants grown under an "electric (and artificial) sun".
Hope this helps, Organoman.