I have used oragel medicinally and it is a topical anesthetic... However, if I recall, it forms a sort of "shell" around the tissue it is used on. This might or might not be a good thing for your purposes... hard to guess. If you are looking for is a "gel" version of Anbesol, there is precisely such a thing BTW... IIRC it comes in both regular and "extra strength" varieties.
Anyhow, if "nobody" has tried this, then make sure to test it on lots of cute and innocent bunny rabbits before you use it to yourself
! Just kidding... but if you do give it a try, start with a /very/ small quantity, and work your way up very slowly.. you might even want to give it a couple days to see if any weird delayed reactions occur... and let us know how it works for you.