Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the gas_station_generator zip.

Usage

1. Open the Gas Station tab in the 3D viewport sidebar (N). With no station selected, click the big picture to browse the designs, or pick a group and a design, then press Add to place it at the 3D cursor. You can also use Shift+A, Mesh, Gas Station.
2. The card at the top shows the design, the brand name, the site size and the face count. Lights On adds the canopy and pole lights; Night Glow makes signs and screens brighter for night shots. Surprise makes a new random station, Vary changes the current one a little and Brand paints a new fictional brand with new prices.
3. The icon tabs hold every setting: Islands & Pumps (dispenser, hoses, a second kind for back rows, rows, islands, guards), Canopy (style, clearance, fascia, columns, LED band, lettering, downlights, solar), Building (kind, placement, size, roof, walls, bays, car wash, sign text), Sign & Brand (brand, grades, prices, sign type), Site & Props (paving, markings, tank caps, light poles, props), Lights, Finish (brand colors, paint, weathering) and Parts & Export (part visibility, detail level, Convert to Mesh).
4. Convert to Mesh keeps the station as plain meshes; Delete removes it with all its parts and lights.

All sizes are in meters. The root empty sits on the ground in the middle of the pump islands; the street side is -Y. Grades and prices are comma separated lists. All brand names are fictional; type your own.