Originally Posted by: Brian Roberts

Key of A at the 5th position but instead of playing an A7 my pinky is playing a G flat.

That's an A dominant 13th. Or just A13. Nice sounding chord!

|---5-(1)----------|

|---7-(6 or 13)---|

|---6-(M3)--------|

|---5-(m7)--------|

|---7-(5)----------|

|---5-(1)----------|

I cover voicings of 13th chords in this lesson, part of the series on extended harmony chords.

https://www.guitartricks.com/lesson.php?input=16342&s_id=1195

G-flat is the enharmonically the same note as F-sharp. And as Herman correctly mentioned it's better thought of as F-sharp in this context, because the key of A major has 3 sharps.

Hope that helps!