The award under the Green Business Tourism Scheme comes after £4.5 million has been invested in the three centres at Kirroughtree, Clatteringshaws and Glentrool.
Keith Muir, head of tourism with Forest Enterprise Scotland, in Galloway said: “Everyone is delighted to have achieved silver status so quickly — our aim is to now go for gold in the coming years.
“We see this award as a big reward for all the hard work everyone has put into making the new centres great places to go, coupled with being environmentally friendly at the same time.”
Keith added: “With the Visit Scotland 3 and 4 star rating also having been awarded to the centres, Galloway Forest Park is well on the way to establishing itself as the key visitor destination in the south west.”
The UK-wide Green Business Tourism Scheme promotes sustainable tourism.
Businesses are assessed to bronze, silver and gold status against a number of eco-friendly criteria, including energy and water use, waste management and biodiversity.
The awards are recognitions that Forest Enterprise Scotland and its visitor centre operators, Galloway Lodge Preserves, Churchill Catering and The Breakpad, are all looking at ways to promote a sustainable and environmentally friendly service.
The Green Business Tourism Scheme were also particularly interested and impressed by the ground source heat pumps which are used at Kirroughtree to heat the building.
The system uses no fossil fuels to directly heat the building or water. Instead, the system takes the ground temperature and transfers that energy into underfloor heating and hot water.