No Gift Wedding..the stress!!

I think you should make it clear it's not expected, but if people want to give something, a monetary contribution to aid in your move would be appreciated. As a guest, I would be delighted (and probably relieved) to contribute money instead of having to worry about a gift.

I think it will be difficult to have a shower without physical gifts, but you shouldn't have any problem with monetary gifts for the wedding. Given your situation, I think guests would be more than understanding and give you money instead of physical gifts

I would hope you are close enough to the people you are inviting that they will know you are moving to a different country, and plan their gift giving appropriately. I wouldn't have a shower though because it would definitely rub some guests the wrong way if you are holding two separate events where you are asking for money.

A shower is for gifts only. Be upfront with guests that you are moving. Do not ask for or expect cash/giftcards.

A shower is a physical gift giving event. It would be pretty odd and tacky to invite someone to a shower and then say "no gifts" or "only cash/check/gift cards please".