Kelp, kudos for getting off klonopin – I’ve heard it can be sheer hell getting off. I’ve heard of some people having problematic reactions to GABA, but some people swear by it so who knows. It is a neurotransmitter so IMO that is always a bit riskier than an herb or vitamin, but why not go by your own biofeedback and maybe do some research so you know what to look out for.
For anxiety, two other things that can be really helpful are b-vitamins and omega-3s.
However, what I would really recommend is an old-school book called “Hope and Help for Your Nerves” by Claire Weekes. It is from the 60s and she kind of talks like you’re a kindergartener, but her methods are so effective.
The other thing that may ultimately be helpful is therapy. If your anxiety stems from something in your past, you may need help working through it.