I've never heard of someone doing it with a G36 so I don't know. I know some people have done it with G21's and G30's with no problem. One person in particular used an aftermarket guide rod with 21lb spring set in his G30. The G36 uses the exact same recoil assembly as the G30 so I'd imagine the G36 would use the same set-up.
Glock will likely give you the standard liability statement of "Only shoot factory new SAAMI spec jacketed ammo in good condition of the chambering listed on the pistol."
Edit: Further search on other forums, I can't find anyone who's tried it, only a bunch of people asking the same question and being told "I wouldn't try it!".