how does a gti 2500 indicate a find the Display Screen will indicate both target size and depth. Graphic ,Signal strength is indicated on the upper scale and size and depth of the When you become completely familiar with the GTI 2500, you will find it can be used. These comparisons indicate that the Garret GTI 2500 should have very good depth It mentions that the Garrett GTI 2500 can find “very small nuggets,The circuitry in the GTI 2500 has been refined from its predecessor, the GTI 2000. indicate the probable type of target you have detected, the GTI 2500 Almost any detector can find targets in a virgin site. customer reviews and review ratings for GTI 2500 Metal Detector This is an incredably powerful detector, the 2500 does have its detectors some say it is to size and composition, and extremely accurate depth indication.