You can write your topic however you want, but you need to answer these questions:
I want the gui to keep resizing the more gui items in it “basically a textlable”
as you can see in this image i have the textlable “Nil” i want the more stuff in leaderstats the more textlable it adds (to automate it beside keep adding to it manually) but problem is when i add more textlables this happens
I assume you are using a UIListLayout by looking at how they behave. To do this you can get the AbsoluteSize property of your original frame and compare it to your UIListLayouts AbsoluteContentSize property
UIGridLayout is usually used for frames that have the same Vector2. If you want to use UIListLayout you can, it is totally fine. Can you explain what you were trying to do in the post other than detecting if the Gui bigger? If you want the player frames to stack downwards try changing the FillDirection property of UIListLayout