Yes, GA is just the English abbreviation of Gigabyte's trademark.
Gigabyte h81m-ds2 motherboard parameters:
Main chipset: Intel H81;
Audio chip: Integrated Realtek ALC887 8-channel audio chip;
Memory slot: ?2×DDR3 DIMM;
Maximum memory capacity: ?16GB;
Motherboard form factor: Micro ATX form factor;
Outline dimensions: 22.6×17.0cm;
Power socket: one 4-pin, one 24-pin power interface,