Thanks for posting your query.
 how quickly u will leave eating gutkha depend upon the time since u are addicted to .
 the most important thing in the process is your will power.
 decrease the amount of gutkha u chew at a time, every day or every week as convenient to you. in parallel to this u need to create practise to chew dry amla or sounf with loung & elaichi availiable on the same paan thaila.remember dont leave gukha chewing suddenly it must be leaved slowly slowly otherwise it is harmful to the muscles worked during chewing , they gets hardened due to gutkha chewing. so they need regular excercise which u do daily during gutkha chewing also it is harmful to digestion if u stop it suddenly.the main idea behind is that u need to convert this gutkha chewing in to dry amla or sounf with loung or elaichy chewing. it takes time because gutkha contains nicotine
so u need to practise both on the begining.
 choose the gutkha brand which has the lowest nicotine ratio generally costlier gutka contains higher nicotines.
Hope this will help you.
Dr Saurabh gupta.