Here is the Regulation terminology from the Solicitation for Scheduled 899 (it is boilerplate for all solicitations):

I-FSS-639 CONTRACT SALES CRITERIA (MAR 2002)
(a) A contract will not be awarded unless anticipated sales are expected to exceed $25,000 within the first 24 months following contract award, and are expected to exceed $25,000 in sales each 12-month period thereafter.
(b) The Government may cancel the contract in accordance with clause 552.238-73, Cancellation, unless reported sales are at the levels specified in paragraph (a) above.

So, Yes, your company can lose your GSA Contract if the minimum sales requirement is not met. Another factor that comes into play is the Contractor Report Card – which is the result of the CAV Visits. If your company regularly has issues keeping compliant with the GSA’s Terms and Conditions, then your company can be at risk as well.