Go to that page and type in your serial number. You need to look and see if there is any drivers for a 64 bit OS. If there is then you know you can install a 64 bit system and get the drivers installed.
If you don't see a 64 bit system for drivers then that means one by one you'll need to manually search thru google for the drivers you have now and see if you can find all of them for any 64 bit system you want to install.
If you can find them then you can still install a 64 bit system.
Answers & Comments
Http://support.gateway.com/support/drivers/dlcenter.asp
Go to that page and type in your serial number. You need to look and see if there is any drivers for a 64 bit OS. If there is then you know you can install a 64 bit system and get the drivers installed.
If you don't see a 64 bit system for drivers then that means one by one you'll need to manually search thru google for the drivers you have now and see if you can find all of them for any 64 bit system you want to install.
If you can find them then you can still install a 64 bit system.