- Generator
- A gasoline or gas engine that produces electricity. Only outdoors, away from doors and windows: its exhaust contains carbon monoxide. Never inside your home or apartment or in a garage. See chs. 9 and 23.
- Giardia
- A common parasite in streams and lakes that causes diarrhea. Boiling, filtering, or disinfecting eliminates it. See ch. 3.
- GMRS (General Mobile Radio Service)
- Two-way radios more powerful than FRS; they can use repeaters. They require an FCC license, which lasts 10 years and covers your family members. See ch. 19.
- Graywater
- Water already used for washing dishes, clothes, or bathing. It is not for drinking, but it works for flushing the toilet with a bucket. See ch. 21.
- Grid alerts (Conservation Appeal)
- Notices from your power grid operator about the state of the grid: calls to conserve, Conservation Appeals, and energy emergency alerts. Check your grid operator's website. See ch. 9.
