Hi Kowari, do You have information about the degree of the relationship among the European population of the species (Leipzig Zoo, Zoo Brno, Zoo Ostrava)? Or just between the two Czech zoos? So the same bloodline or not?
Leipzig former giant squirrel came from Plzen zoo's stock in 2006 where it had arrived in 2003. I suppose Brno's ones were imported later, but before 2007, when those in Ostrava arrived, so the giant squirrels in the two Czech zoos are almost certainly unrelated.
It seems that some of the Czech zoos (Brno, Ostrava, Prague, Plsen?) have built up a connection with the Colombo Zoo, exchanging animals.
The following link mentions a first animal exchange between Brno and Colombo (Sri Lankan Leopards for a Chapman Zebra and a P-Horse) that took place in 2004. In 2007, Brno Zoo received the two GGS's and a Fishing Cat.