I've Intel Pentium G2030 3.00 GHz processor with Gigabyte H61M-S1 Motherboard. I am using Windows 7 OS.
which Intel(R) HD graphics version I have?
It just ships with Intel HD graphics, no number: G2030 processor
I like wikipedia's "List of Intel Pentium microprocessors" for this as it lists processors by generation, and in a table so you can get a sense of how yours compares to others.
There's also Intel Core to see how those compare and the CPU Architecture pages; for your G2030 see the Ivy Bridge page <en.wikipedia.org/wiki/Ivy_Bridge_%28microarchitecture%29>
which gives GPU clock rate which might help some : 650MHz Normal, 1050MHz Turbo.
Also <en.wikipedia.org/wiki/Intel_HD_and_Iris_Graphics>
is helpful; for Ivy Bridge it points to <www.intel.com/support/graphics/sb/CS-033757.htm>
and there you can look up your processor.
Quoting Intel, for "Intel® Pentium® Processors 2000/G2000 Series with Intel® HD Graphics" :
"The product... do[es] not support the following features: Intel® Insider™ technology, Intel® InTru™ 3D Technology, and Intel® Clear Video HD Technology."
DirectX : 11.0
OpenGL : 4
OpenCL : No
Shader model support : 5
Intel® Quick Sync Video : No
Intel® Wireless Display : No