Bought the AirGlass Brotect Screen Protector by Bedifol GmbH. It does not fit perfectly.
So, I mailed them the screen protector removed from my Gemini for their review and whatever.
Maybe they will use it to fine-tune their tooling and re-offer the Brotect as guaranteed-to-fit the Gemini. Maybe not.
BTW, they then refunded my $8.23 purchase.