I've heard plenty of good things about Proline. Although it seems that some have problems with the high dose gear. In this case cutting it with something else would fix the problem. I am not sure what GTP is.
It's all good bro. proLINE and GTP (Golden Triangle Pharm) are both underground domestic gear. yes it is sometimes dosed a little strong, but hell sure beats the vet gear on my list anytime-
just beware of the gtp 200mg prop, hurts like a mo fo!