I’m trying to make it so my text size increases and moves accross the screen and fades. I’ve been looking up some code with no luck on how to alter already existing gui text. Also is there a way to do the same thing easily with a gui texture ?
Download iTween from the Asset Store (free) and use that (once downloaded make sure you "prepare the workspace for iTween). The documentation is here:
http://itween.pixelplacement.com/documentation.php
You could use the FadeTo/FadeFrom functions for the fade. Use the visual path editor for the movement. And use ScaleTo for the size.
You can use GUI.matrix to scale anything rendered with the GUI API. Note that scaling up text by more than about a factor of 2 will make it noticeably pixelated. A bit more info can be found in this question.
For making text fade away, use GUI.contentColor with an alpha value.