I know this thread didn't start with Gideon, but lacking a full signature and only initials doesn't convince me the subject rifle is also a Gideon. Attached are the two attributed Gideons I owned - both have been attributed to Gideon over many years and with many owners. The less decorated one is probably the same one Buck and Ron Gable owned as I bought it from Gable many years ago at KRA, Carlisle. It may also be the same one in the other pic by Simens.
The fancier one is the one I owned for years and is my Berks book. It was bought by a guy who specialized on Gideon's upper Susquehanna guns and he was absolutely convinced these are by Gideon, and until something better like a full signed rifle comes up - I do too.
And I don't think the subject rifle above is similar enough to attribute it to the two rifles I show here (attributed to Gideon). The initials could also be George Avery, a Hamburg, Berks gunsmith about the same period. Never seen one of Avery's but Hamburg is Simon Miller territory, the earlier gunsmith, and not far from Upper Susquehanna/Schuylkill County.
Secondly, I don't see enough similarity to the two attributed Gideon's to the subject's patchbox and I see no carving of any kind on the 2 above Gideons. And I don't see any of those quirky regional engraved designs Stophel Long and Carl and Jacob George put on their brass - kind of a wave on the center of their box lids like this better Gideon has.
Just my thought, but I have to defer from calling the subject rifle a work of the other two rifles Gideon Angstadt or not - it must be some other GA, than the two shown here. we best wait for more solid info on Gideon before calling this one of his, particularly since we aren't positive about Gideon's work. In short, since none of them have positive Gideon Angstadt identifiers, maybe none are.
Patrick Hornberger