Studbook is kept by Berlin Zoo
Gaur are actually woodland animals; I don't like their open paddock at Whipsnade. The bongo paddock at Chester might suit them, if it were larger.
It was a young Male that was in transit to Whipsnade and was housed at Chester for a few months until Whipsnade were ready to recieve it.
Conan, born at London Zoo in 1984, and died at Whipsnade in the mid-2000s. He was a very impressive animal. I'll dig out some photos.
By the approximate date of death you mention, was he the father of the young male they have now? That bull died before the calf was born, so about four years ago now, and Whipsnade have only had one pair at a time(in recent years anyway).
After Conan died, Whipsnade received a new male from Munich the same year. This male was the father of the young male they have now. It also mentioned in this edition that Whipsnade hoped to build up a breeding herd of Gaur.