There is no such product as NORTON Ghost Solution Suite. The Ghost Solution Suite product is a corporate product badged as Symantec, whereas the Norton Ghost product range (based on different technology to GSS) is intended to serve the retail market.
First of all, check that you have run LiveUpdate to bring the version to 11.5.1.2266 as this version is required for Win 7 support.
Then confirm that you are using a WinPE boot disk rather than PCDOS, as the latter does not support SATA devices which are now standard in currently shipping hardware.
Are you sysprepping the image before deployment?
Are your computers all the same model? If not, how are you accommodating the different driver requirements? (eg Deploy Anywhere)
Are you aware that Windows 7 consists of two partitions and both are needed for successful booting.