home made vga cable wiring question for use on vga monitor only

[northerngames]

I am making a gamecube component cable into a true gamecube vga cable.

 The directions say to peel back and twist the metal ground foil off each of the seperate red green and blue wire's and put a heat shrink tube over each of the twisted foil grounds for each color.

 Then connect them to there matching red ground pin green ground pin and blue ground input pin for the vga monitors input.

 Then on top of it they have you running two seperate ground wires to the regular ground inputs.

 My question is does vga monitors really need there own seperate ground on eveything like that?

 I know arcade monitors dont need the grounds all seperated but not sure with the regular pc vga monitor.

 Can I just do it the fast and clean way and just take one ground from the output pin and wire it to any ground pin of the input gound and then just use a junction pin and ground all the other ground pins to the same common ground line so they all run off the same ground?

 I ask becuse my way would be faster and cleaner and take less time to do but I want to be sure before I do it.

http://www.geocities.co.jp/Technopolis-Mars/9984/vga_e.htm

[northerngames]

 Well I tried it the easy way and made it with a common ground for all the pins like arcade monitors and it gave me an out of range display only.

 I need to open it back up and make sure everything is still connected correctly wich I am pretty sure they all are and if so then the R,G,B, ground pins must be seperate for sure like they were in the pics.

 So I think I am all set on this post but will leave it for others in case they try it also.