Hello jrr219,
In this case the Chipset itself it does support the GTP partitions but you have to change the Chipset SATA mode to RAID, then to enable UEFI Boot, it is usually on the boot tab, it's necessary to reinstall the OS from scratch, keep in mind that you need a copy of windows 7 with the UEFI feature. UEFI will let you recognize hard drives with 2TB or more.
Let me know your findings
Regards,
Amy.