It's nice that you have the knowledge and take the time to do it the old school way. My Mom always made her gravy in a similar manner. Nowadays, we just use gravy from a jar.I've never browned the giblets before putting them in the stock. I may try it, along with the neck and whatever else I put in. I cut off the "butt" of the turkey and the tip sections of the wings and put them in the stock also, along with a bit of onion (and carrot if I have any). I also cut the neck and the wing tips into smaller pieces before I put them in, so more of the goodness will be released from the bones. Then I just strain really well before I make the gravy.
Pro tip: I don't really like to use much bullion, but Knorr chicken bullion in the cubes is the best I have ever tasted. It has a more complex flavor than most bullions that just taste like salt and chicken flavor.