Electoral college representatives are currently elected on a statewide winner-take-all basis except Maine and Nebraska, each of which assign two electors (corresponding to the votes due to two Senate seats each state gets) based on the statewide winner while assigning the other electors based on the winner in each Congressional district.

So, in those states only, electoral votes can be gerrymandered in exactly the same was as Congressional seats, because they are exactly the same districts. (Of course, both states are small enough that the gerrymandering opportunities are fairly limited, and would have limited impact on Presidentual elections, as Maine has only two CDs and Nebraska only 3.)