Ghair Muakkadah Salah
Unascertained prayers. These types of optional Salah (prayers) were much, but not always, practiced by the Prophet Muhammad (S.A.W.).
Gharar
Selling something which has not yet been obtained. For example, selling eggs which have not yet been hatched.
Ghayy
Deception. Name of a pit in Hellfire.
Ghazawat
Plural of Ghazwa. Also called al-Maghazi. See Ghazwa.
Ghazi
A person who has taken part in a Ghazwa.
Ghazwa
A battle for the cause of Allah in which Prophet Muhammad (S.A.W.) himself took part.
Gheeba
Talking evil about someone in his or her absence. Backbiting. See Holy Qur'an, Al-Hujurat (49:12).
Ghulool
Stealing from the war booty before its distribution.
Ghusl
The full ritual washing of the body with water alone to be pure for the prayer. to do Ghusl: 1. Wash your private parts, 2. do Wudu (ablution), 3. wash your entire body without touching your private parts again.
More information:
Gog and Magog (Ya'juj and Ma'juj)
Two evil empires. They are mentioned in the Qur'an and Ahadeeth (Bukhari and Muslim) when mentioning some of the scenes just before the final hour. See Quran, Al-Anbiyaa (21:96), Sahih Muslim, Kitab al-Fitan wa Isharat as-Say'ah.