Originally Posted by: Swe_ShredderIs this just like how the G major is the same as the E minor? I am trying to understand this theory stuff and my heads is exploding

It is not hard at all.
You have to understand first of all, that the G major scale and the E minor are not the same scale.
The G major scale has a "major tonality" and it is supposed to be played over a G major chord.


The E minor scale has its origen on the E major scale, to which you flat the 3rd, 6th, 7th.
E major scale=[E-F#-G#-A-B-C#-D#]
E minor scale=[E-F#-G-A-B-C-D]
As you can see, when you flat the 3rd, 6th and 7th of the Major scale, it becomes a minor scale, and it is Relative to the G major scale.
Not just because they have the same notes does it mean that they are the same scale.
The E minor scale has a "minor tonality" and it is supposed to be played over an E minor chord.

Now take a C major scale (C-D-E-F-G-A-B) and raise the 4th note a semitone, and you get a C Lydian Mode (C-D-E-F#-G-A-B) and now this mode has the same notes as the G major scale, but it is supposed to be played over a C major chord, not a G major chord.
The best thing to do, is to compare the Lydian mode against the major scale(Ionian).

C major=.....[C-D-E-F-G-A-B]
C Lydian=....[C-D-E-F#-A-B]
The raised 4th note is the caracteristic flavor of the Lydian Mode. In the previous example that note is "F#"

Now I am not saying that you cannot play a minor scale over a major chord;
because you can if you know what you are doing.
You can use Syncopation to accent the rigth notes, and then you have to resolve the dissonant notes to any of the consonant notes.