I want to develop with these tools:
I installed PyCharm, but up to now Python and g
use 32 or 64 Bit version of Python?
You can pick any, it doesn't really matter.
how to install gtk for python (pip or exe)?
You should able to install it with pip: pip install pygtk
.
Use virtual env in PyCharm or use "Existing Interpreter"?
If you don't know, you probably need "Existing interpreter".
There should be an option to select path to your python.exe
It should be there: Menu->File->Settings->Project->Project Interpteter