I considered that, does gDrive have a problem with commercial use? I mean, we're a non-profit but still, can we get shutdown?
I don't think the TOS says you can't use it commercially.
Business uses of our Services
If you are using our Services on behalf of a business, that business accepts these terms. It will hold harmless and indemnify Google and its affiliates, officers, agents, and employees from any claim, suit or action arising from or related to the use of the Services or violation of these terms, including any liability or expense arising from claims, losses, damages, suits, judgments, litigation costs and attorneys fees.
However, I think a Gapps account can be used to have an "official" buisness stamp of approval.