The GK Group in brief

GK is Scandinavia’s leading end-to-end technical facility manager and contractor. We work with all technical systems in all kinds of buildings, and have departments within project design, installation and service. Our team of more than 3300 employees in Norway, Sweden and Demark provides world-class projects and technical services to some of Europe’s harshest environments. Out track record comprises large, complex installation projects, such as a new hospitals, museums, theatres, hotels and data centres.

We cover all technical disciplines

Our larges divisions are ventilation, electricity, plumbing, cooling, building automation and security. We also have competence within system integration, sprinklers, heating and energy conservation consultancy. We make sure everything works well together, and that our customers achieve significant energy and environmental benefits in combination with optimum comfort – throughout the building's entire lifecycle.


GK was established in 1964 and is owned by the Karlsen family alone.

Business areas

New buildings and existing buildings

Contact us

Group head office
GK Gruppen AS
Ryenstubben 12
0679 Oslo
Tel. + 47 22 97 47 00

Pb. 70 Bryn
N-0611 OSLO
Head office Denmark 
Ørbækvej 268 C
5220 Odense SØ
Tel. +45 6614 2412
Head office Sweden
Gunnar Karlsen Sverige AB
Solna Strandväg  21
171 54 Solna

Tel. + 46 (0)20-63 10 00


For suppliers

We work closely with our suppliers to develop the best solutions and cooperation possible. We also work hard on finding new and innovative products and suppliers to cover new needs and business opportunities. Our strong focus on using dedicated suppliers secures the suppliers high volumes and a Scandinavian access.

All suppliers are thoroughly qualified by our purchase department. New suppliers should contact Christian Sælemyr Johansen , Director Purchasing and Logisitcs.

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