King and Pawn endgame: Win? Draw? Loss?

How to proceed, White to move:

lichess.org/editor/8/5p2/8/6Pk/5P2/8/8/7K w - - 0 1

Здравствуйте

Nice position, quite instructive.

So, how you gonna do it? ;)

Nice one. :)

(But I think I've actually seen it before...)

1. g6 fxg6 2. f5 Kg5 3. fxg6 Kxg6

@arQNhGUI The trick is of course to know how to continue correctly after 2...gxf5. ;)