Consumer ChatGPT, consumer Gemini, and the accredited versions on GenAI.mil are different systems with different data handling, even when the underlying model is identical.
≈2 minLandscape facts checked — re-verify before relying on them.
What may go where. IL5 answers "may this system legally process this class of information?" It never answers "is this paragraph right?"
The rule card
Information
GenAI.mil (IL5)
Consumer apps (personal accounts)
Classified, any level
Never. Wrong impact level. Full stop.
Never.
CUI
Yes, within your command's guidance.
Never.
PII
Per your command's privacy policy.
Never for official work.
Public / unrestricted (open-source references, general how-to questions)
Yes.
Only if your command permits it, and never for official work products.