Short answer is no. The timing gear is a press on fit. To remove it requires the same thing (a shop press) or a heat torch and a lot of patience.
If your timing gear is broken then to fix it right you have little choice but to pull the engine and disassemble. You won't necessarily need to remove the head, but the timing cover and oil pan have to come off. This means pulling your harmonic balancer and removing the pushrods and lifters. You'll have to check for metal shrapnel in the oil pan. Now would be a great time to replace the oil pump and clean up the oil pickup tube.
Many people recommend replacing the crankshaft gear and timing gear as a matched set. If you do this then you will need to use a crank gear puller to remove the gear. When you re-assemble be sure to line up the timing marks correctly.
If you're lucky you may have only chewed up the gear on the distributor. If so then you'll replace the distributor (or distributor gear) and pull and clean the oil pan. I would pull the camshaft anyways to make sure no damage was done.
-ftyler
