Sheetgo can sync the data that is stored in your spreadsheets in your Google Drive. If you have spreadsheets that are stored in another places (e.g OneDrive, Dropbox) you can use cloudHQ.
If you are looking to migrate just one Dropbox account (either personal or Dropbox business account), then you just need to create a migration sync pair from individual Dropbox account to Google Drive account or to Google Drive Team Drive. The main limitations of that approach are that sharing metadata is not migrated.
The instructions how to sync your Cloud account with Google Drive are below.
Note: you can find more instructions step-by-step here.