Pros can work Gigs in any city that Gigs are posted in. To change your city;

1. Tap the three lines at the top of the home page of the app
2. Tap settings
3. Change the zip code you want to see gigs in or near
4. Tap save
5. Click the X at the top right to go back to the home page

If you confirm Gigs in different zip codes, those Gigs will all show up on your schedule tab in the app.