Hmmm.. Did you ask them "why" they want your GP to review psych meds?

Because GP's just dont know enough about them to do anything them if changes need to be made.
If it was me I would call whoever back and have them explain in great detail what the reason for seeing your GP is all about..
My GP knows all about my Psych meds but would
not fiddle with them at all.
Good luck !