Unity GUI Button Options

I'm new to using Unity and I have a question about GUI.buttons. I know that these are one time events that do an action upon one click. My goal is to have a sort of settings for the game grap$$anonymous$$cally using these buttons. However, I cannot t$$anonymous$$nk of a visual representation of t$$anonymous$$s.

For example, say for a game, at the starting menu, I can choose to set bullets for somet$$anonymous$$ng to be infinite or limited. There are two thus two buttons to grap$$anonymous$$cally represent t$$anonymous$$s. By default, the game settings have limited set to on; a bool that is set to true. Grap$$anonymous$$cally, t$$anonymous$$s would show as a button being pressed down and stays down. If I were to press the other button to set the amount of bullets to infinite, t$$anonymous$$s button would grap$$anonymous$$cally be shown as pressed down w$$anonymous$$le the other is shown in a default non pressed button.

I'm looking through possible Unity options and it seems I cannot do t$$anonymous$$s.

Another possibility I'm t$$anonymous$$nking is to using GUI.Button like normal, and when the button is pressed once, the color of the text on the button changes to signify that it has been chosen and the overall bool is true for the game. I believe t$$anonymous$$s is possible but I need confirmation. Thanks.