use ui.text instead code example
Example 1: error CS0619: 'GUIText' is obsolete: 'GUIText has been removed. Use UI.Text instead.'
/*Add at the beginning of the code:*/
using UnityEngine.UI;
/*then replace GUIText with Text*/
Example 2: how to solve error CS0619: 'GUIText' is obsolete: 'GUIText has been removed. Use UI.Text instead.'
/*Open the . cs file that Unity is indicating on the error (you can use any text editor for this, even notepad)
Insert*/
using UnityEngine. UI;
/*on the beggining of the . cs file.
Replace GUIText with just Text.*/