Pictures, please. No more available for me, just checked
In Answer to original poster:
No porting, no adding weights, maybe a limbsaver. Lots of handling and shooting the gun - not from a bench. Get used to the rifle - it will not abuse you.
Chuck H. once wrote about the GG: "Build like a fence post, it is ment to be carried a lot and shot but little. If, only in desperation." Cool wording, but rubbish.
I have two GGs - 400gr. GS Custom FN @ 1750 fps. They work a lot.