Does anyone here know of a gunsmith who uses the maker's mark "GLS"?

I have a Springfield Model 1922 that has been heavily customized - converted to centerfire, rebarreled and chambered for a .22 Hornet, with a banded hamp front sight with a hood and a single standing blade rear signt. There is a custom stock in the classic tradition with a steel grip cap, checkered steel butt plate with widow's peak and a black (not sure of material) forend tip. It's a 5-shot repeater with a slanted magazine fitted inside a hinged magazine release. It's really a nice rifle. If I had to guess, based up the very little use the rifle exhibits, I'd say it's likely to have been done post WWII and perhaps far more recently.

The only marks for a maker I can locate on either the wood or the metal are the initials "GLS" which are stamped in the inletting between the recoil lug and the magazine well.

I've checked with the only active ACGG member (Gene Simillion) who might have these initials. The mark is not his. Another suggestion was Gary Stiles, a former ACGG member who passed away in 2012.

Do any of you know who that mark might have been used by?

Thanks.

Rem