Would you leave if your gf got pregnant?

I think I'd need more information first.

Well communication, respect and loyalty all play into a relationship n sounds to be like all have been broken or non existent I'd be out the door 

That's deceptive. I would leave.

That is a hard place to be in. Regardless of how she got pregnant, she made a huge life decision without talking to you about it and just assume that you will be supportive. This show a complete lack of respect for you. If you are in a serious committed relationship, big decisions that will affect both of you should at least be discussed seriously before action is taken. It is her choice to do what she wants with her body, but it is your choice whether you stay with someone who makes decisions without having the respect to ask you how you might feel about it. 

I did not vote because the situation seems like it has some background information. If I was to base it only on what you said, Sorry but I would leave. The biggest reason being that she didn't say how. That would only leave me to believe that she cheated. Had she been artificially inseminated and not told me then I would try to stay and work it out. Women in straight couples trap their men all the time. While it is a terrible thing to do men are pushed by society to do the honorable thing. I don't think leaving would make you less honorable but if there was no infidelity then it's worth a shot to try. Especially if y'all are serious.

That is a major life decision she made without discussing it again with you and knowing your objections. That is a serious problem.

Id have to know how she did it first. But still, without telling you....

I'll be honest and say I considered doing just that to my wife (not cheating. Just doing the AI). But I guess the difference is, she wants kids, she's just so disgusted with the whole process that I was afraid I'd have to do it secretly. Although if she decided she didn't want kids from the start, I wouldn't have continued the relationship. Becoming a mom is a dream for me and I couldn't be with someone who would deny me that. So I empathize with the pregnant girl in your senario, but it's not how she should have done things. I would fully expect my wife to leave me had I done that and she didn't want kids.