Without knowing exactly what device you have, like chip set CPU and the like and also what base ROM....
1. Galaxy s4 forums are not going to be of much help anyway, it's a clone so it's not a galaxy S4.
2. Yes I think you might be in a bit of bother...
P.s. my in law had a no name 10" tablet it was Chinese and didn't have gapps, I didn't know anything about it, couldn't find any ROM support any where on Google or xda, tried every technique I know to root, turned out it had secure write only system partition (can't remember the correct name), so gave up...
This is major drawback to buying clone noname knockoffs...
Sent from my GT-I9505 using xda app-developers app
Update: 17th november 2013
Samsung G S4 stock BMG4 + root
with cf-auto root + philz recovery.
HTC Desire HD
(Hboot 2.00.0029 AND S-OFF)
SVHD V 2.1.0
Retired HTC Legend