The stadium, which has been the club's home since 1890, will now be known as The GPW Recruitment Stadium until the end of the 2010 season.
Saints' chief executive Tony Colquitt said: "GPW have been long time supporters of the Saints.
"We're sure this partnership will have benefits for both organisations to go from strength to strength."
St Helens have submitted plans to build an 18,000-capacity stadium on a derelict 46-acre site on the edge of the town centre to the local council.
Subject to gaining the necessary permissions, work is scheduled to begin on building the stadium this year with the first game set to be played there in 2010.