Direct proof of use
A Defense Visual Information Center photograph archived through Wikimedia Commons and public-domain image mirrors documents Royal Saudi Land Force AMX-10P infantry combat vehicles with the 20th Brigade during Operation Desert Shield. The image caption places the vehicles in Saudi Arabia during the coalition buildup phase of the 1990 Gulf War.
That evidence supports AMX-10P fielding by a coalition force in the Gulf War theater. It does not, by itself, document AMX-10P weapon firing, combat losses, or a specific Desert Storm ground-combat engagement.
Sources: Wikimedia Saudi AMX-10P Image, NARA Desert Shield Image
Timeline
The war began after Iraq invaded Kuwait on August 2, 1990. The U.S.-led coalition air and ground campaign began in January 1991 and ended with Iraq's defeat and withdrawal from Kuwait on February 28, 1991.
During Operation Desert Shield, a Defense Visual Information Center image recorded Saudi 20th Brigade AMX-10P vehicles displayed with a 155 mm GCT self-propelled gun. The cataloged image date is inconsistent with the operation's chronology, so the secure milestone is the Operation Desert Shield theater context rather than a precise day.
Sources: State Department Gulf War Milestone, Wikimedia Saudi AMX-10P Image, NARA Desert Shield Image
Narrative
The documented AMX-10P presence was Saudi, not French or U.S. The cited image identifies the operator as the Royal Saudi Land Force and the unit as the 20th Brigade, placing the vehicles on the coalition side of the conflict.
The AMX-10P entry therefore treats the Gulf War connection as source-backed theater fielding by coalition forces. The current evidence is narrower than a confirmed combat-use record: it shows Saudi AMX-10P infantry combat vehicles in the Desert Shield theater, while leaving open whether those vehicles fired their weapons or took part in specific engagements during the later ground campaign.
Sources: Wikimedia Saudi AMX-10P Image, NARA Desert Shield Image