|• Mayor (2014–2020)||Annie Gonthier|
|4.52 km2 (1.75 sq mi)|
|• Density||250/km2 (650/sq mi)|
|Time zone||UTC+01:00 (CET)|
|• Summer (DST)||UTC+02:00 (CEST)|
|Elevation||85–183 m (279–600 ft) |
(avg. 122 m or 400 ft)
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. 2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.|
The site has been inhabited since the Gallo-Roman epoch.
In 1883, the commune of La Queue-les-Yvelines was detached from Galluis with the dismemberment of the former commune of Galluis-la-Queue.
Antoine-Germain Labarraque (1777 – 1850) was a French chemist and pharmacist, notable for formulating and finding important uses for "Eau de Labarraque" or "Labarraque's solution", a solution of sodium hypochlorite widely used as a disinfectant and deodoriser. He died in Gallius on 9 December 1850.
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