Why is my GUI changing its size as window resolution changes?

Here is an image, do I need to run a script in order to prevent it from resizing?

http://i.imgur.com/RaVefoO.png

You're using scaling on Size as well as on Position.

Scaling is like the % of your screen. 1 = 100% of your screen Scaling is the first and third numbers in a UDim2. Example:

{1,0,1,0} is Scaling

What YOU WANT: OFFSET

the second and fourth numbers are offset in a UDim2

Example:

{0,100,0,100}

If you don't want it to MOVE or RESIZE based on your window resolution, use ONLY offset.

You can change these in a GuiObject's properties.