Things You'll Need
Instructions
Turn on your PlayStation 2 and insert "GTA: San Andreas" disc.
Load your game and travel to your airstrip in Verdant Meadows, Las Venturas (the northern-most part of the map) to use your Jetpack. A prerequisite to having the Jetpack is that you must have completed the mission "Green Goo."
Use your Jetpack to fly to San Fierro, the left-most island. Look for Kincaid Bridge which is a red rail bridge spanning Easter Bay (consult your Map in the Pause Menu to find its location). Fly along the bridge until you see a concrete archway on the San Fierro side of the bridge. Atop this archway is the Minigun.
Land on the archway and walk into the Minigun to equip it.