You can buy property in GM Palya. G M Palya is very good located to live for with lots of greenery around near by Baghmane Tech Park and well connected to all important places. So if you are investing in this area you can expect good appreciation after 2-3 years.
Even you can go for Jagdishnagar, is that the area is surrounded by well known residential areas like Tippasandra and Indiranagar. Therefore access to schools, clinics, stores and market is good.
Jagdishnagar is no doubt a good locality but the disadvantages of this locality are no drinking water is supplied by municipal corporation, very narrow for which there is traffic congestion, no proper street lights, infrastructure planning is completely missing, as this is a private layout and last but not the least the area is surrounded by slums. I do not think it is a good idea to invest in this area as you cannot except appreciation in short period