GMA can mean a lot of things such as:
1. Good Morning, America!
2. Gloria Macapagal-Arroyo
3. Greater Manila Area, and a whole lot more...
like this one:
GMA (the Intel Graphics media Accelerator) ---> is a series of integrated graphics processors introduced in 2004 by Intel, replacing the earlier Intel Extreme Graphics series and being succeeded by the Intel HD and Iris Graphics series.