Is there a program that can edit roblox guis So you can make guis and then put them in roblox

Yes, the Roblox studio itself lets you edit GUIs. You can't edit the offical Roblox GUIs which are baked into the system, but you can make your own GUIs and edit GUIs that others have created. You can start by clicking insert --> object --> ScreenGui. Then put additional GUI objects into the new ScreenGui.