Emailing with attachments to a mailto or web client

[liamob1]

Does anybody know a way of directly attaching a file to gmail (via the webclient) using mail to or via the send email functions. We have multiple users that move around the building so setting up outlook for each user is becoming a nightmare. They use iPads so the send mail script function works here, but on a desktop we would like it to force open GMail or use Mailto: and take the attachment with it. I've tried everything i know about mailto and i'm at a dead end. 

I did think about trying to integrate google drive HOWEVER i have no experience with Googles API's.