Just my opinions...
The best Indian restaurant in Glasgow is Mother India ... it's Indian home-style cooking, with no funny artificial colours.
The best Chinese restaurant is Wong Ho... best Chinese i've ever tasted, but the service is a bit overbearing... topping up your glass every 5 minutes, etc.
Not sure if i would recommend Royal Exchange Square as it is a gathering place for the goths and skate kids, who occasionally have brawls there.