Continuing with the basic guitar chords series let’s take a look at the F# (sharp) / Gb (flat) chord.
Here’s the basic form:
A quick video to help you master this F# (sharp) / Gb (flat) chord:
And some variations of the F# (sharp) / Gb (flat) chord:
That’s all there is to it. Have fun 
(Images by http://www.all-guitar-chords.com/)