What is coffee garlic? Gordon Ramsey did an AMA on reddit. He said this:


  "I would go down the rouse of recently we've been using lots of dry
  spaghetti, with lots of coffee garlic, chili, preserved lemons. Once
  we've roasted off the garlic, the chili, the shallots folded in the
  spaghetti, olive oil. We've been putting some really nice cans, tuna,
  over the top of the spaghetti, so it's almost like a sort of quick
  fish past the dish but your using cans, very good cans, of tuna. with
  some fresh capers, parsley, and a little bit of preserved lemon.
  Delicious!"


I'm not sure if this is a typo or not but does such a thing exist as coffee garlic?  What is coffee garlic?
Coffee garlic, is as suggested most probably a phone typo reply from Gordon Ramsay's AMA.

However, there is a youtuber who has a "spicy garlic coffee spaghetti" video (posted before the GR's AMA).  This consists of instant coffee, red (sweet bell) pepper, garlic and chorizo. 
Also if you care to research you'll find dishes with coffee and garlic together.