Universal Time or Greenwich Meridian Time (GMT)

Getting the Universal Time - GMT

Select GetDate() as LocalTime

Select GetUTCDate() as GMT_Time

GetUTCDate Returns the datetime value representing the current UTC time (Coordinated Universal Time or Greenwich Mean Time)

Select DateDiff(second,GetDate(),GetUTCDate() ) as DifferenceinSec
will give you the difference between GMT and your Local Time