Gia or GIA may also refer to:

• Gia (album), an international album by popular Greek singer Despina Vandi
• Gia (song), a Greek single by Despina Vandi taken from the album of the same name
• Gia (people), (sometimes Giya) an Indigenous Australian people
• GIA Publications, a publisher of Contemporary Catholic liturgical music

Organisations

• Gemological Institute of America
• Groupe Islamique Armé (French for Armed Islamic Group), a terrorist Islamist group in Algeria
• Grantmakers in the Arts (Arts Philanthropy affinity organisation)

Aviation

• GIA, the ICAO code for Garuda Indonesia
• Ghana International Airlines
• Gambia International Airlines
• Glasgow International Airport

Other uses

• Generations in Arbitration (GIA), an international conference event to promote international arbitration and to bridge the gap between young students and experienced practitioners.
• Government Information Awareness, a website which collects information about government programs, plans and politicians from the general public and numerous online sources