Anyone have experience adopting an adult gsd?

I grew up with a german shepard and absolutely love these dogs and now that I am out on my own I have been looking to adopt one. I moved to a city that has dozens of gsds up for adoption at a local shelter. One of my biggest concern is how loyal these dogs are like my pup at home would absolutely not be okay if she was taken from our family and put up for adoption. My older sister also has a gsd and they completely inseparable. I was wondering if someone could give me their experience with adopting a gsd at around 2 years old and let me know if this is an actual issue or not. We got both the gsds in my family at less than 8 weeks and I don't know if it's possible to form the same bond with one as an adult. Any input would be greatly appreciated.

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EDIT: Thank you all for your responses it seems like everyone had positive experiences with their grown gsds and it convinced me to go this weekend and finally take one home. I will be sure to post some pics to this sub once I get him/her.