There are 30+ possible spawn locations where the Gun Van in GTA 5 can appear ... see the icon on their mini-map, from where they can further reach the pin-point location of the seller.

The military base is listed as "Lago Zancudo" on this nice satellite view depiction of GTA 5's map, and it's just south of the North Chumash beach. To the east is Mount Josiah and the small town ...

If you've already has a cactus snack at one of the GTA 5 peyote plant locations during ... which I've marked on the above map – you can click on it to view a larger version.

The GTA Online Shipwreck ... Grand Theft Auto 5, it is a small unincorporated community located in the Blaine County region of the map. Note that Shipwrecks change their location every day ...