Good advice! Thanks.What DOES Gomer like? I'd think long and hard about it and make a list (even if the list includes escaping from scary things) and use those things to create that bond to build on. It already sounds like I could list that he enjoys interacting or learning from the other dogs, car rides (looking out the windows), if you think he enjoys walks more than they scare him add that to the list, and try to do the things on the list as much as possible. I'd also try and associate treats with all these things, even if he only sniffs the treats, so he's building conditioning that treats = good things. Usually we use treats to condition that something else is a good thing, but there is no reason why we can't do it the other way around and condition them that something they do like is associated with treats, making treats more reinforcing by themselves.
So far I would say he likes meat treats, walking (particularly on trails), seeing other dogs/ greeting other dogs (potentially will play with other dogs), I've only taken him on a few car rides but he seemed to enjoy them, sniffing (when he is mostly comfortable in his surroundings), hiding, running away from scary things, pacing, walking in a v shape, being in enclosed spaces such as the kennel, he also has a curious side and some commotion brings him out of hiding. He also really likes the small, soft rug in the bathroom.