PR and logistics staff in Whitehall have called in the agency - which produced the opening and closing ceremonies at the 2004 Athens Olympics - as they iron out details of how to manage interest in the event, to take place from 6-8 July.
Jack Morton, which won a pitch process to secure the contract, will transform a stable-block into a press centre equipped with editing suites, phone lines and internet links.
Security will be tight, with press accreditations being approved by Tayside Police.
Reports in Scotland have suggested that as many as 200,000 protestors could demonstrate in Edinburgh during the summit over what they see as inadequate action to reduce poverty in the developing world.
A fence will create a five-mile cordon around the Gleneagles complex to prevent unauthorised access.
A 'Scottish village' will be created to showcase the best of the country's heritage, industry and tourism, as well as local products, to the media.
Gleneagles' PR is handled by its PR manager Simon Brown, alongside Edinburgh-based Elaine Howie Public Relations.
Meanwhile, Perth & Kinross Council, in whose locality Gleneagles is situated, has various PR activities planned to engage local residents in the event.
It is, for example, hosting a local speech competition on climate change.
The council also hopes to distribute a CD-ROM about Perthshire to accredited journalists during the event.