Reporting back.
The gravy was a tad salty (even for me and I like salt) but everyone enjoyed it. I think rinsing the brined bird would've been helpful but I didn't have control over that part since one neighbor brined the bird, another neighbor roasted it in his oven, and I happened in on the gravy making end. Also, there was ALOT of liquid in the pan (like 4 or more cups worth) when I removed the turkey from the roasting pan....and little to no brown bits, so the gravy didn't turn out as brown and flavorful as I prefer, and as I usually obtain when making roast turkey gravy at home. All in all, a learning experience.
Thanks to all who responded with help.