Gafing or Gaffing: How To spell?
The word Gafing is misspelled against Gaffing, which is present continuous of "Gaff"
Gaffing has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Ga & ing which should not be misspelled with single 'F'
Wrong Spelling:  Ga-f-ing  Correct Spelling:  Ga-ff-ing 
Find more wrongly spelled words of Gaffing to spell it well.