This is the end of John's letter to Gaius. He gives some final remarks and closes with a greeting.
John does not wish to write these other things at all. He is not saying that he would write them with something other than pen and ink.
"Face to face" here is an idiom, meaning "in person." AT: "in person." (See: rc://en/ta/man/translate/figs-idiom).
"May God give you peace"
"The friends here greet you"
"Greet each of the believers there for me"