Hi de facto.
Now my perf people tell me the one engine toga aint a regulation that the climb gradient is for all engine so i could use the lower DA.
I have read the same somewhere else (but I can't find the reference at the moment), and the same is true for us operating into OPO on the southerly runway (4.9%).
One argument is that we do far fewer GAs than take offs, therefore the chance of having an engine failure on the GA is more remote. The practical solution is to look at the engine out procedure for the take off case. If you suffer an engine failure on the GA (unlucky day) then advise ATC that you're unable to comply with the standard missed approach and follow your EFTO procedure.