Incumbent Harvard, which has co-ordinated European PR for Corbis for the past three years, did not repitch for the business.
The EMEA brief is newly created and the appointment of GH comes after a restructure of Corbis's comms.
GH corporate director Kara Day leads the account, reporting to Matt Burgess, EMEA marketing director at Corbis in London.
Harvard had reported to Corbis's Seattle office.‘There has very much been a shift in emphasis to the EMEA regions, which meant we put the account out to tender,' said Burgess.
‘The EMEA markets are very important to our growth strategy and we wanted to treat the region with more autonomy.'
Corbis will use GH in London as the hub for its PR strategy across EMEA, but will also use the agency's network of global offices when necessary.
Corbis is one of the two biggest image libraries in the world along with rival Getty Images. It wants to capitalise on the explosion in the use of digital media.
Set up in 1989 by Gates, it owns iconic photographs such as that of Marilyn Monroe's famous pose over a Manhattan subway grate, and Albert Einstein sticking out his tongue.
The company is based in Seattle and has 20 offices throughout the world.