I have a Univega Nuovotech and the Gran Tech might just be the same frame with better components. If so, it would be aluminum main triangle bonded with chromoly stays. The white might even be the same pearl color as mine. It had full Exage while this is some Ultegra.

Decent 700c aluminum/steel bike but I prefer all steel. This was on Crigslist and I found the price to be a bit high.