Is it one of those annoying head gaskets that can be mounted flipped over and rotated?
Yes, it can go on one of two ways. It is on right now so that its stamped-in number can be read, and a "W" on one end of it matches a "W" stamped into the block. I'm not sure it would matter, as the block is really symmetrical.
At least you know your water pump works :)
And it doesn't even leak! -- Jim