Hello,
I am already here in US and my Both Parents are permanent Residents. Is there a way they can sponsor me ? and how long does it take for me to get the GC and can I stay in US at that period??
Assuming you are unmarried and 21 or older, the wait is around 7-8 years, and you can't stay in the US during that waiting period unless you have some other legal status separately from the green card petition.
You can adjust status only if you are in the US legally 7 or 8 years from now. Otherwise you'll have to pursue the GC process through a consulate in your country of citizenship (or another country if you have legal residence there).Will I be able to adjust my status from F-1 (Student) when my parents petition the file for GC ?
You may AOS to a dual intent visa; H1b is acceptable.