Ok i was able finaly to get GPS to work. And after thousand of try, IG stop crashing.
For the coder who are listening, if you do that :
Launch IG
while(getwindowhandle(IG));
setparentwindow(IG,MYWINDOW);
other instruction
IG will crash while in other instruction. It seems that IG doesn't support to have a parent during his first second of life. (yeah like a children until 18 years old
)
So i put IG as my child the first time i draw it in navigation screen.