While there isn't a single official "console command" specifically for the Gigastructural Engineering

The Megastructural Marvels of Stellaris: A Guide to Console Commands

Note: This will finish all megastructures currently being built in your empire. 2. Spawning Specific Structures

# Select the planet (size 25+ recommended) effect spawn_planetcraft = yes

If you want to skip the wait for "Gigastructural Engineering" tech: research_technologies (Researches everything, including mod techs). Specific Tech: research_technology tech_gigastructural_engineering Important Tip: Finding IDs

Summary Table: Most Useful Giga Console Commands

These specific event triggers and effects are unique to the mod or highly useful for its features. 1. Core Galactic Event Triggers