I know this may seem like an odd question but humor me.

Could a non-GUM based 737 pilot (for example a ORD-737) pick up a trip in GUM from open-time? Are there ever even open-time trips in GUM or is there enough crew coverage to prevent open-time?

I know it would be a long commute but if someone just wanted to test it out and see what it was like before bidding for GUM could they?

Do mainland 737 reserves ever get DH'd out to cover flying in GUM?