It's a lot like clown loaches, pictus catfish, several other pack oriented fish. You can keep them solo, but to truly get the best out of them you need a pack. Solo they'll always be shy and hide. In a large group they get their best colors and activity
Yep, I have 15 Geos in my tank I have to say they're not affair of me, even when I put a net in the tank they don't even care or try to avoid it like other species. They are BOLD in a large group and always beg for food when I'm around the tank.