Lake Gulbis is located in Renda parish, Kuldīga Municipality.
Area of water surface – 24.6 hectare
Average depth – 1.7 metre(s)
Maximum depth – 3.1 metre(s)
Metres above mean sea level (MAMSL) – 48.4 metre(s)
Maximum length – 1.0 kilometers
Maximum width – 0.4 kilometers