I want to locate where the gear box oil goes in my vautomatic vitara 1996 model

Gear Box Oil refers to manual transmission normally. Goes in a 1/2 inch or so hole in the side of the box. You don't need to add unless it is leaking. Remove the plug and put your finger into the hole. If you get oil on your finger, it is full.

I'm not familiar with a 'vautomatic' ... if this is a type of automatic in the Suzuki (I am a Suzuki MC expert) you will find the dip stick in the engine compartment. There will actually be two dip sticks ... one for engine oil (black) and one for the trans (oil should be red or pink). If it is dark or smells burnt, have it replaced.