The GSD says the introduction of a property tax by the Government highlights a critical cash shortage driven by historic financial mismanagement.
Opposition MP Roy Clinton says the recently-gazetted bill has raised more questions than answers, leaving investors uneasy.
Minister for Taxation, Nigel Feetham, announced the measure in his budget address, saying it targeted those conducting a 'property trade'.
The bill means those who own three or more properties - not including their primary home - will be subject to a new tax on profits from sales.
Responding to GSD criticism today, Mr Feetham said it ensures property ownership benefits the many, not just the few.