Emerald City, finding out your child has challenges and gifts all rolled into one can be overwhelming. My first piece of advice is to take a deep breath and realize, you won't be able to solve it all at once, but that's ok. It *will* work out and everything will be ok. It's going to take time, and it will take a lot of work. When you see a clear path to go, head there - but when you're looking at 1800 different things to do and not sure which to do first, just pick what feels right (gut feeling) and move forward. The thing that you will find, no matter which direction you choose to move in, is that you'll change course a few times along the way - and that's ok too.
Here are a few suggestions for you, based on our experience with DCD and written expression disorder:
1) For the gross motor, swinging is great. We live in a cold climate, and my first thought re winter was nordic skiing - it's been a great help for my dd who had low core muscle tone when she was young. Snow shoveling too
One sport our kids do that isn't hugely expensive (here) is rock climbing - that also might help with core strength, and it can be a lot of fun for some kids
2) Since your ds has DCD, does he have any struggles with ball sports (throwing, catching, kicking)? I only ask because this has always been tough for my ds. I wish, in hindsight, I'd spent more time playing ball with him just one-on-one when he was younger - he'll do it now but wouldn't then because it was tough and he didn't like it, but I think it would have helped a little bit with core strength plus helped him not feel so awkward in PE.
3) Re writing - I'd start him typing asap.
4) For getting his thoughts on paper, you might try graphic organizers - there are tons online that you can find via googling. Another thing to try is software - Inspiration allows you to map out your writing (sorta like a graphic organizer or flowchart), and then will convert it to outline form automatically which can then be exported to word processing software. That's a bit ahead of where your ds might be right now, but there's also a children's version of Inspiration called Kidspiration. My kids never used it, so I'm not as familiar with it, but when we were first starting out both were available for free trial periods.
5) Re gifted, I wouldn't panic if it has to take a backseat for now while you try to accommdate/remediate his 2nd e. If you *can* get gifted services/differentiation through school now, go for it! But if you can't, try not to over-worry about it. Focus on the 2nd e for school and for the $ you have to put into therapy etc, and just continue to challenge him intellectually at home. Once you have the foundation in place that the therapies etc you choose to do now to remediate what you can due to DCD etc, then you'll find that once your ds is a few years down the road at school, when more gifted options are available, he'll be ready to fly
Hope that makes sense - it's late here lol!
Best wishes,
polarbear