Have not finished reading past this post yet so I don't know if anyone has replied but did check on what is available in GJ testimony. From the link below it sounds like that the GJ testimony relating to the charge should be made available but not the entire GJ testimony.
Upon request the government must disclose to the defendant, and make available for inspection, copying, or photographing the defendant's recorded testimony before a grand jury relating to the charged offense.
"Rule 16, 1, B, iii - the defendant's recorded testimony before a grand jury relating to the charged offense."
Rule 16. Discovery and Inspection