Trying to wakeup, my body was paralyze. i started shaking violently in my upper rt body. woke-up, with pain left back of head. should i be concern?

Yes, should be.: Possible partial seizure (have you stopped your Gabapentin in the recent past), and/or even a small ischemic stroke (any other symptoms?). You may have also woken during a very specific period of sleep that can cause momentary paralysis when transitioning from sleep to wake, but that wouldn't cause head pain. I would recommend getting assessed by a physician asap with workup to be safe.