1945: Foundation of Ing. Grill & Grossmann as a steel construction company in Attnang-Puchheim
1972: Development of the non-insulated GIG facade system
1980: Development and focus on exports
1996: Restructuring of the company group and change of owners 
1998: Foundation of sales office UK
2003: IFN Holding AG and Pohn Management GmbH take stakes in the company group
2007: Foundation of sales office USA
2011: Foundation of sales office Russia
2013: New owner structure of GIG HOLDING GmbH. IFN Holding AG as the new majority owner now holds a stake of two thirds, and Pohn Management GmbH holds a stake of one third in GIG.