Im new here so not sure how this works needing assistance with adding key less entry on gs300 yr 2000 i searched all i located was wiring its a simple oem unlock/lock trunk release but no where has a how to

 

So you are saying your car does not have keyless entry? Do you have a base model?

 

All lexus have had keyless entry as standard minus maybe the ES250. You're probably better off going aftermarket rather than factory with is extremely expensive assuming you dont have a master key, which I assume you don't.