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.