What I see is gilt worn off to reveal silver on the heel, the sides of the shoulders, the lip of the bowl, the edges of the stem, and worn completely off the handle, all areas of expected wear - if silverplate on brass, would expect to see the reverse, Personally, wouldn't worry about the gilding removed (but of course, it isn't mine), doubt that it's original and would wonder if it was applied after that unfortunate repair in hope of making it look 'better'...
My personal experience with 'GORHAM
& CO.' marks has been the total opposite, haven't run across any silverplate bearing that mark, and wouldn't expect to since they didn't produce plated wares in that period, but have seen loads of later 'GORHAM CO.' silverplate. Below are the Gorham & Co. marks shown in Carpenter, as well as early electroplate marks from the same book:


~Cheryl