Gmail has a cool search operator called has:attachment. Enter that into Gmail’s search engine will give you every email attachment you’ve ever received in Gmail. You can also refine your search such as, from:gbush has:attachment. This will give you all the mail from anyone with the email prefix gbush that contains an attachment.
If this is something you are liable to do often, create yourself a filter in Gmail to automatically tag new mail the the tag ‘Attachments’ and then you’ll have one-click access to all mail containing attachments.