BRCGS

Is this possible to have brcgs with excluded scope. and there is no physical segregation of the building but only time and scheduling segregation. 

I highly doubt this (as you described) would be allowed.

Now if there was physical separation - possible, however the area is still subject (just like with SQF) to inspection to ensure that there is nothing from that area that could impact on the area included in the certification (scope.)

BRCGS have got very strict on scope exclusions. If you look at p100 of the standard it clearly sets out that it is not allowed unless "the products are produced in a physically segregated area of the factory". 

So in this instance I think it's totally clear, it cannot be excluded from scope if you are only segregating by time.

Why would you want to by the way?