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The For C{{supSharp}}{{11}}, the E and G are bolded because these notes can be played using open strings. For G{{supSharp}}{{11}}, G, B, D, and A can be played on open strings. Let's find a way to play it. We'll start by adding the open E and G strings, then finding trying to find the other notes. For the G{{supSharp}}{{11}}, using the open A and G strings inverts the chord. For root position, we won't be able to use all the open strings, but we can still take advantage of some of them.
→Notes on Voicing
{| class="wikitable"
! Chord !! R !! M3 !! P5 !! m7 !! M9 !! A11
|-
! C{{supSharp}}{{11}}
| C || '''E''' || '''G''' || B{{b}} || D || F{{s}}
|-
! G{{supSharp}}{{11}}
| '''G''' || '''B''' || '''D''' || F || '''A''' || C{{s}}
|}
C #11 G #11 G #11 2 E o|-|-|-|-| F ||i|-|-|-| F ||i|-|-|-| F# |-|-|m|-| B o||-|-|-|-| C# ||-|m|-|-| G o|-|-|-|-| A ||-|m|-|-| G o||-|-|-|-| Bb |-|-|-|p| D o||-|-|-|-| D o||-|-|-|-| D |i|-|-|-| C# ||-|-|-|p| A o||-|-|-|-| C |-|-|-|r| G ||-|-|r|-| G ||-|-|p|-| 5
That's C{{supSharp}}{{11}} still a bit difficult, but if we omit the D (9th), it becomes a very simple voicing. Guitar For the G{{supSharp}}{{11}}, the chord shape above is a difficult instrument pretty easy to voice chords with play and includes all 6 unique notesof the chord. Unfortunately, the A11 and P5 are in the same octave, but often this is creating a moot point.m2 interval. Hence, the G{{supSharp}}{{11}} voicing 2, which avoids any m2 intervals but drops the B (M3) of the chord.
Extended chords generally apply to Jazz, in which guitar is often accompanied by bass and/or piano. This means the guitar may not be responsible for supplying every note of the chord. For instance, the bass may play the root note (or other bass note for an inversion). This allows the guitar to omit this note from the chord. Piano can take this even further, allowing the guitar to play as little as 2 notes of the chord.