Dr Bridgman said he was a low risk to the island and claimed that his isolation violated article five of the Human Rights Convention.
His challenge was not against the Bailiwick's strategy as a whole, just the level of risk that he presented.
He had received full vaccinations while in New Zealand, but they are not recognised in Guernsey at the moment. He travelled to Guernsey via Singapore then Heathrow and Gatwick Airports, spending 10 hours in the UK while in transit.
Director of Public Health Dr Nicola Brink told the court that Dr Bridgman had travelled through an international hub airport and taken a bus from Heathrow to Gatwick with others.
In a brief hearing, Judge Catherine Fooks delivered her decision but said she was not ready to provide her full judgment and would do so later.