I have a 5.5 GB and a Pacific.
Hands down, I'd keep the Pacific any day and any time.
For what I can appreciate, it is a far more refined and better designed piece. There are so many little details on that knife.
I dont have a 7" GB, but I guess the balance must be spot on. However in the 5.5 the handle has most of the weight, and it feels like it is actually heavier than it is. Conversely, the Pacific is so excellently balanced it feels lively and lighter in the hand.
Also, the Pacific's serrations are better, in that they are less obtrusive. You can featherstick with them and use them as a regular edge for the most part. It also has a better size, is way more comfortable and versatile, and the tip is more acute. It stabs jolly good and better than the GB, that has a more obtuse geometry.
In summary, a no brainer. The Pacific is not only superior to the GB, it is easily one of the top 15 "military" knives ever made, and that's saying much. So good it is my go-to knife and arguably better than any other one I know.
The only thing better in the GB is the sheath. I swapped that hideous ACUPAT sheath for the green GB one, that by the way, also comes with paracord.
Hoped this helped.