here is something that might interest you .
When the lord of the house, in which Gulika is posited, is strong and occupies an Angle or Trine, his own, his exaltation sign or a friendly house the native have chariots, elephants and horses, will be handsome like cupid; enjoying great respect and widely renowned and will dominate over the world. (Phaladeepika chapter 25 sloka 30
The only explaination I can offer is this . As far as the 11th house goes , Kumbha is said to be his own house , which happens to be the 11th in the natural zodiac . This may be one of the reasons that the 11th is his favorite number .
Shilpa ji, I was inspired to write about Gulika because I noticed that there are more shrines and temples for Gulika / and Maandi than Shani . This is especially true in South Canara District where I hail from . I am told this is even more prevalent in the coastal regions of Kerala . A good Kerala astrologer will plot Mandi on a chart even before he places the other planets on the chart . Such is the importance given to Gulika and Maandi . I am trying to muster up as much information as I can on them . I will continue posting what ever I can find on this thread , so that we can get all the material under one roof . I have also placed a order for a 'Prashna' software which should throw some light on their placements and calculation methods .
here is some information on the importance of Gulika in local folk lore , Kerala Fisherfolk Ritualistic and Cosmic Elements by P. R. G. Mathur
Gulikan or Mandi is propitiated by the Hindu fishermen all over Kerala. The Gulikan is connected with diseases and death. Horoscopes are cast by every Hindu of Kerala in which the position of the Gulikan is clearly indicated. The Gulikan’s position indicates when the person will die. When death occurs in a fisherman’s house, it is customary to plant a stone outside the house representing the Gulikan. An informant informed me that stone representing the Gulikan will never be installed in the room reserved for ancestors or in any of the house. However, the fishermen believe that once the Gulikan is propitiated by installing a stone on the earthen platform, it will prevent death. The Gulikan is generally worshipped to get big fishes like etta and avoli. They vow to conduct a special puja in honour of the Gulikan by offering etta and avoli. They fulfil their vow by making votive offerings when they get these species of fish. The Gulikan is periodically propitiated by the offer of kuruthi (water mixed with turmeric and lime), today, bananas and flowers. A wick lamp is lighted for the worship. A red fowl and a ram are sacrificed in the Gulikan’s honour on important festive occasions like Omam and Vishu. Sometimes, the oracle of the Gulikan, in trance, directs the fishermen to handle times of crisis. The oracle reveals the causes of illness and discloses the remedy.
The Mukkuvans of Malabar believe that there are four kinds of Gulikans: Brahma Gulikan,Vishnu Gulikan, Abhimanyu Gulikan, Asura Gulikan. They further believe that if the Asura Gulikan is displeased tensions in the family are bound to arise, besides infights among the members of the crew. In such cases the Mukkuvans consult the kaniyan (village astrologer) and seek their advice to ward off the wrath of the enraged Asura Gulikan. The kaniyan prescribes the remedy in the form of a magical rite called Puramneekkal which is similar to Uzhinhu Vangal. A oracle is invited to conduct this rite. The articles required for the purpose prescribed by the magician and the astrologer are: a cooked fried fish (etta, aikkora, and narimeen), coconut oil, potato, lady-finger, bengal gram, beaten rice, puffed rice, etc. A thigh of the cock is roasted in the fire and given to the Asura Gulikan. The total expenditure for conducting the rite comes to Rs. 100.
Best regard's
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[This one's natal has Gulika conjoined a waning Moon in 11th house (Saggitarius) - but the mother's all hale & hearty!]