Right off the GPO site:
TOUGH. TECHNICAL. BRILLIANT.
German Precision Optics (GPO) is a leader in the development, engineering and design of binoculars, riflescopes and rangefinders. Our mission is to create premium-quality products that meet the needs of serious hunters, birdwatchers, and nature enthusiast, and that are built to the highest German optical standards. Different from other European premium optics brands, we do not charge a premium price for our products. What makes this possible is our ability to source the best optical components and outsource our final production and assembly, but we demand that these facilities meet our high German standards. Furthermore, to ensure these standards are met, we have invested in an extreme quality control structure, whereas all of our products are hand-inspected and quality-control tested by German engineers in Germany 100% of the time.
Also the owner of GPO is the former CEO of Zeiss Europe and the other guy was the President of Zeiss USA and also worked for Steiner. They use the same materials and lenses Zeiss uses for their optics.
The video I watched a week or so ago the CEO of GPO was explaining that they have finally made their nest in Germany and outsource only to European companies now. He said no Asian companies for GPO.