When installing Win 7 to a SSD, you should remove the HDD (just disconnect it) until the OS is installed. Also, why GPT vice MBR? You really only need GPT for larger than 2TB partitions.
Still your system will boot via MBR and GPT partitions.
If i didn't have GPT I had an error about being incompatible with the OS, so I changed to GPT, as it seems MBR doesn't want to support Windows 7 64-bit, but it'll support 32-bit.