Hi Stan. The Gringo was Orange's base model MTB from the late 90's to mid 2000's. It was replaced by the G2 and G3 that are still available today. Tidy bikes if nothing too special.
I would fit new cables and outers, spray through the shifters with WD40 and then give it a ride. At that stage you will see how worn everything is.
Next stage is to re-pack the headset and hubs with grease.