No, honestly, I've made a gaff and I'm proud of it!
According to
Nick Miller's book, the gaff's quite a complex spar, starting (at my idiosyncratic scale) at 9mm at the mast, widening to 10mm in the middle and then narrowing to only 7.5mm at the far end.

I know I've posted about spar making before but please excuse me for repeating myself; there don't seem to be many posts about it on here and somebody might find it useful.
So, one starts with square stock, planed down to slightly over the maximum diameter:

I used my Peter Plane (my favourite tool) to reduce the square sections to those listed above. The
spar gauge is then used and, by its nature, copes with the change of section.
Then, the spar is planed down to the pencil lines giving it an octagonal section. After that the new edges are planed again to get closer to a round. I did this by eye but with full size spars I understand then often mark them again.

If you click on the first of the above pictures you should be able to make out the taper. By the second it's ready for sanding.

So here it is, round(ish) and sanded and tapered