I've been reloading for Glock 9mm and .40 for about 15 years. No problems. It reloads the same as for my other pistols.
The address some common concerns:
Glock says don't shoot reloads
Sure and so does nearly every other gun manufacturer. reloading is done at your own risk and will not be covered by warranty according to almost every mfg.
Don't shoot lead bullets in Glock polygonal rifled barrels
Depending on the hardness of your lead bullets they may or may not smear more than other means of rifling. The specific concern is that lead may build up faster in Glock barrels and cause dramatic increase in pressure. Many of us find that if you clean your barrel well after every 200-300 rounds then the lead will not build up. I do this about half the time and no issues whatsoever. Also, depending on hardness of the lead bulelt esides increased lead smearing you may get less accuracy. If you are still concerned you can get an aftermarket barrel (Lone Wolf, Storm Lake, KKM, BarSto, etc) with traditional rifling. Or just reload plated or jacketed bullets.
Glock barrels cause dangerous case bulges
Apparently some Glock pistols do allow the base of the case body to bulge out some, but certainly not all, and I question whether this is dangerous or not. I would see for yourself how your pistol forms the cases and see if it is a problem for you or not. I shoot a Gen2 G22, Gen3G19 and G23, and Gen4 G27 and have not seen this happen at all. Nor have I seen it in the hundreds of cases I have picked up at the range from other shooters.
In summary I do not do anything different for my Glocks than I do for any other pistol reloading.