I think other posters have made some very valid input, considering we have no details, aside from you only having had the horse 10 days & you use a twisted bit. As much info as you can provide that you think could be relevant will help.
My advice would to first & foremost have him & his gear thoroughly checked out to rule out/treat any physical issues, such as teeth, bit, neck, back, saddle, hoof... pain. Give him a fair bit of time to get over any of these issues before attempting to start riding him again.
Especially if he needs time off being ridden anyway, I would put some time into developing a good relationship with him on the ground first. Calm & gentle is a good start, but I like to ensure I have a good willing relationship & communication going on the ground before getting on a horse these days generally. I would ensure he understands well how to yield to pressure in a variety of ways, including *gentle* rein signals.
When it comes to getting on him, ensuring nothing's going to hurt him is a start, so I'd throw away that bit in favour of a bitless bridle, especially if he's had any mouth/bit issues, or at very least, a double jointed smooth bit or such. Then I'd start 'riding' but only in baby steps. Eg. see how he is with you getting into mounting position & if he's not good with it, don't go further until he is. Mount but dismount immediately, before he can get upset. Mount & ask him to just stand there. Etc, etc. In other words, reinforce what you get & only ask for 'harder' stuff after he masters the easier steps.
Oh & stick to a smallish enclosed area for now, so you can safely *ask* him to respond to you & persevere gently without having to attempt to force him or worry about him running away with you.
I'm not experienced with gaited horses, but I would suggest you get the basics going well before worrying about that sort of thing.