The Gbsus2 is not an easy chord if you have a weak pinky. We start off by barring the whole first fret with the index finger. Place the top joint a little past the G string and press down making sure to contact all the strings. You want each note to play without any dead or buzzing sounds. After you have the barre in position your middle finger goes on the second fret of the E string and the pinky is stretched over to the fourth fret of the A string. Keep these two fingers as straight up as possible to avoid interfering with other strings.