On the specification page of ASUS website for gl552vw, it says...
- 1TB HDD 7200 RPM
- 1TB HDD With 128 G SSD SSD (M.2 2280)
However the variant cn426t is not specifically elaborated. From the above specs, it can be assumed that the motherboard of all gl552vw variants has a M.2 slot. However the only entity that can confirm is ASUS itself.
The best way would be to call up ASUS customer support and confirm with them. If they confirm you have a M.2 slot on that specific model, you are good to go.
The volume of the drive doesnt matter. If it can work with 128gb, it should work with 1tb just fine.
But one other thing you need to check is the length of the drive. I think there are three different sizes, not sure which one is compliant with your board.