The guy gave you this letters and told you that it says gfy, is trolling you. In no arabic dialect of 23 countries this could mean gfy. Never 

 Now you are trolling me. Either that, or you are excessively dumb. In any case, please GFY 

 I was serious till now, but gfy sob. 

 LOL, so you're exceedingly dumb. See ya 👋