First off, your question sounds like it’s coming from a Creationist point of view, not a Christian one. Most Christian denominations are not opposed to the theory of evolution. Here are over 11,000 christian clergy who support it. http://www.butler.edu/clergyproject/Christian_Clergy/ChrClergyLtr.htm
Secondly, you’re confusing things when you say “if man came from apes/gorillas”. All gorillas are apes, but not all apes are gorillas. Some apes are chimps, some are orangutans, some are gibbons and some are humans. The term “ape” means any member of the superfamily Hominoidea, of which humans are members. http://en.wikipedia.org/wiki/Ape So humans did evolve from some other ape, which evolved from an ape before it, and so on back to the first ape, which evolved from something very like a monkey, though without the characteristic tooth patterns of modern monkeys. But there’s no evidence that any of those ape ancestors of humans were gorillas, or any other living ape.
Third, humans are still evolving. http://www.sciencedaily.com/releases/2007/12/071210212227.htm
http://tinyurl.com/ylsam6
Finally, gorillas don’t adapt to their environment by becoming more human because the evolutionary steps towards becoming more human don’t provide an advantage. Natural selection can’t look ahead and say, “You know, if you guys had bigger brains you’d be better off in the long run.” It can only select traits that make individuals better off now. Humans had to give up a lot for our big brains. They require something like 20% of the body’s total energy intake, despite accounting for only 2% of the body’s weight. http://hypertextbook.com/facts/2001/JacquelineLing.shtml So our ancestors had to have access to more and higher quality food to provide for their larger brains. Also, no other animals have such difficult and deadly childbirths, made necessary for us by the huge size of our infants’ heads. And no other animals have young that are so dependent on their parents for so long, thereby allowing infant brains to continue growing long after birth. For our ancestors, given their position as already fairly intelligent and social primates trying to adapt to the savannah after having evolved in jungles and forests, all that turned out to be worth the cost. For other animals such as modern gorillas, maybe not so much.