Current flows from $+$ to $-$ but electrons go the opposite direction.
When I connect the GND of a positive charged electric circuit board to earth, then the board accepts electrons from the earth until the board is neutral.
But let's look at another situation where
the GND of a neutral board is not connected to anything
I am negatively charged, after rolling and jumping on the carpet for a while
(1) What happens when I touch the $GND$ of the board? Will the board accept extra electrons from me until the board and I are at the same potential. (Both negatively charged.)
(2) If so, what happens when I stop touching $GND$ and I connect GND to earth again? Then, can the board donate the extra electrons back to earth? Isn't there a lot of circuitry (like diodes and stuff) controlling the direction of current towards $GND$ and (since electrons go the opposite direction) thus preventing the electrons going towards earth?