First of all - unless I missed a meeting - isn't ALL distilled alcohol gluten-free? (Clue being in the word 'distilled')
Second - please can someone who can Google better than me confirm that Mike Mentzer's old school (i.e. no Cardio, Clen, DNP, Bronkaid, etc. just pure f**king starvation!!) diet included a double daily 'gimlet of vodka'...