It may or may not help. I would say this is more of a trainer issue then a hormone issue, find a good trainer that's experience in GSD's and work with them.
If you're considering the neuter, then talk to the vet and breeder, those are your two best sources of information as they know you and your dog best and are experienced.
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010